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


This set of LS swap cast manifolds is uncoated. They are cleaned up after casting to remove blemishes and mold lines, then oiled to prevent corrosion during shipping and handling.

For coated models that offer... (Read More)

This set of LS swap cast manifolds is uncoated. They are cleaned up after casting to remove blemishes and mold lines, then oiled to prevent corrosion during shipping and handling.

For coated models that offer corrosion and thermal protection, check out Hedman Hedders 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
  • 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
  • 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
  • Head Type Factory Heads
  • Bolts/Studs Included Yes
  • Collector Bolts Included Yes
  • Gasket Or Seal Included Yes
  • 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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