LS ENGINE SWAP CAST EXHAUST MANIFOLDS; RAW STEEL LS ENGINE SWAP CAST EXHAUST MANIFOLDS; RAW STEEL LS ENGINE SWAP CAST EXHAUST MANIFOLDS; RAW STEEL What happens when you use standard headers on aftermarket cylinder heads? Sideview of Hedman LS Swap Cast Manifold with dimensions Top view of mounted LS swap Cast manifolds with dimensions. LS ENGINE SWAP CAST EXHAUST MANIFOLDS; RAW STEEL
Top view of mounted LS swap Cast manifolds with dimensions.

LS ENGINE SWAP CAST EXHAUST MANIFOLDS; RAW STEEL

LS ENGINE SWAP CAST EXHAUST MANIFOLDS; RAW STEEL


Hedman Hedders has been manufacturing tubular steel manifolds-- Better known as headers, since 1954. We've always been on the the cusp of fresh designs for new vehicle models from Detroit, and whatever... (Read More)
Hedman Hedders has been manufacturing tubular steel manifolds-- Better known as headers, since 1954. We've always been on the the cusp of fresh designs for new vehicle models from Detroit, and whatever creative engine swap applications you hot rodders have come up with over the last 60+ years. Every so often, something comes along that sends the automotive hobby into a frenzy, and around the turn of the century, the LS engine was put into use by General Motors. It only took a couple of short production years before this innovative, next-generation SB Chevy started to find their way into classic American Musclecars, like Camaros, Chevelles, EL Caminos and C10 trucks. Today, the LS engine is the staple of the classic car hobby, and has even found its way into the import/sport compact market. It is no longer unusual to find one of these efficient, compact powerplants in a Nissan 240SX, Mazda Miata or Porsche. While Hedman Hedders has thoughtfully designed application specific headers (with Trans-Dapt and Hamburger's pitching in with engine mounts and engine swap oil pans) that fit right in and provide excellent performance, the shear variety of vehicles LS engines find their way into means it would be impossible to economically offer a specific design for everything. In response to the demand for an LS header that will work for these less popular LS swap projects, Hedman Hedders now offers an LS Engine Swap Cast manifold Set that fits tight against the engine block for maximum clearance-- But larger, smoother exhaust runners and ports to offer exhaust flow that blows the factory manifolds away. This set of LS manifolds is uncoated. They are cleaned up after casting and oiled to prevent corrosion during shipping and handling. For coated models, check out Hedman Hedders #'s 68743 (Black Maxx Black ceramic coating), 68746 (Polished Silver Ceramic coating), or 68748 (Matte Silver ceramic coating) (Read Less)

Product Specifications

(PLEASE REVIEW THE FOLLOWING PRODUCT SPECIFICATIONS & FOOTNOTES THOROUGHLY)

  • Tube Diameter 1-5/8 in.
  • Air Conditioning Yes
  • Automatic Transmission - Column No
  • Automatic Transmission - Floor Yes
  • Manual Transmission - Column No
  • Manual Transmission - Floor Yes
  • Collector Attachment 2-1/2 in.
  • Collector Diameter 2-1/2 in.
  • Collector Size 2-1/2 in.
  • Color Raw Cast
  • Emissions Notes NOT LEGAL FOR STREET USE ON '75-LATER MODEL YEARS! Legal for off-road use only.
  • Engine Chevy LS Series
  • Finish Uncoated
  • Finish Type Uncoated
  • Flange Thickness 0.375 in.
  • Product Type CAST MANIFOLDS
  • Head Style Factory Profile
  • Header Style Manifold
  • O2 Sensors Included No
  • Port Shape Round
  • Power Steering Yes
  • Product Details Engine swap exhaust manifolds for installing an LS engine into Pre-1974 GM cars and trucks, and non-traditional LS engine/vehicle chassis combinations
  • Installation Notes Exhaust Adapter Kit available separately. Order Hedman #00740
  • Material Cast Steel
  • Tube Design Cast manifold
  • Tube Size 1-5/8 in.
  • Head Type Factory Heads
  • Bolts/Studs Included Yes
  • Collector Bolts Included Yes
  • Gasket Or Seal Included Yes
  • Primary Tube Diameter (in) 1.625 in.
  • Header Finish Uncoated
  • Vehicle Use A-Body (GM) 1964-67
  • Vehicle Use A-Body (GM) 1968-72
  • Vehicle Use A-Body (GM) 1968-72 (Coupe)
  • Vehicle Use A-Body (GM) 1968-72 (convertible & El Camino)
  • Vehicle Use A-Body (GM) 1978-81
  • Vehicle Use F-Body (GM) 1967-69
  • Vehicle Use F-Body (GM) 1970-74
  • Vehicle Use F-Body (GM) 1975-81
  • Vehicle Use G-Body (GM) 1982-88
  • Vehicle Use X-Body (GM) 1968-74
  • Vehicle Use C10/C15 Trucks and SUVs; 1967-72
  • Vehicle Use C10/C15 Trucks and SUVs; 1973-87
  • California Proposition 65 WARNING: Cancer. For more info visit www.P65Warnings.ca.gov

Vehicle Applications

      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions NotesRACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
      Vehicle Specific Information
      FootnotesLS Swap Manifolds
      Emissions Notes1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
      Engine FamilySB CHEVY Gen III/IV (LS engines)
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