What happens when you use standard headers on aftermarket cylinder heads?

Standard Uncoated Headers; 1-3/4 in. Tube Dia; FULL LENGTH Design

Standard Uncoated Headers; 1-3/4 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design

Product Specifications

(PLEASE REVIEW THE FOLLOWING PRODUCT SPECIFICATIONS & FOOTNOTES THOROUGHLY)

  • Tube Diameter 1-3/4 in.
  • Tube Style Long Tube
  • Collector Style Ball and Socket Style (Gasketless)
  • Air Conditioning Yes
  • Automatic Transmission - Column Yes
  • Automatic Transmission - Floor Yes
  • Manual Transmission - Column Yes
  • Manual Transmission - Floor Yes
  • Collector Attachment 3 in.
  • Collector Size 3 in.
  • Reducer Outlet Size 2-1/2 in.
  • Exhaust System Dia 2-1/2 in.
  • Contents headers, gaskets (when applicable), 3-bolt exhaust adapters, hardware
  • E.O. # Yes
  • Emissions Notes EO# D167-33 (click here for covered vehicles in document on ARB.CA.GOV website)
  • Finish Uncoated
  • Finish Type Uncoated Mild steel
  • Flange Style Standard
  • Flange Thickness 0.375 in.
  • Header Port Shape Square
  • Header Style Long Tube
  • Notes 68-95 GM Class A Motorhome SUV 396-502 2WD
  • Port Shape Square
  • Power Steering Yes
  • Material Mild Steel
  • Tube Design LONG TUBES
  • Tube Length Long Tubes
  • Tube Material Thickness 18g
  • Tube Size 1-3/4 in.
  • Variations 66127, 69827
  • with A.I.R. System No
  • with EGR No
  • Weld-Up No
  • Tuned No
  • Bolts/Studs Included Yes
  • Catalytic Converter(s) Included No
  • Collector Bolts Included Yes
  • Crossover Pipe Included No
  • Gasket Or Seal Included Yes
  • Installation Hardware Included Yes
  • Motor Mounts (Included) No
  • Mounting Hardware Included Yes
  • Reducers Included Yes
  • Transmission Mount/Crossmember (Included) No
  • Y-Pipe Included No
  • Quantity Sold as a pair.
  • Primary Tube Gauge 18g
  • Primary Tube Diameter (in) 1.75 in.
  • Package Contents Set of Headers, mounting hardware and gaskets
  • Header Material Mild Steel
  • Header Finish Uncoated
  • Cylinder Head Port Shape Square
  • Cylinder Head Stock Profile Heads
  • Header Construction Standard-Duty
  • Replacement Gasket 27550
  • Replacement Head Flange Gasket 27550
  • California Proposition 65 WARNING: Cancer. For more info visit www.P65Warnings.ca.gov

Vehicle Applications

      YearC.I.D.LiterCylindersDrive Type
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
      Vehicle Specific Information
      Air ConditioningYes
      Power SteeringYes
      Auto Transmission - ColumnYes
      Auto Transmission - FloorYes
      Manual Transmission - ColumnNo
      Manual Transmission - FloorNo
      Footnotes(1) Without smog injection or injection heads.
      (38) 16 gauge tubing.
      (4) Includes parts necessary to retain emission devices. (50 State)
      (42) Square port hedder.
      (6) Modification to stock exhaust required to retain catalytic converter.
      E.O. NumberD167-27
      NotesCHEVROLET Class "A" Motorhomes with a 396-454 BB Chevy
×