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Weiand 177 Pro-Street Supercharger Intake Manifold

925-6121WIN


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Weiand 6121WIN
$793.95
177 Pro-Street Supercharger Intake Manifold
  • Chevrolet Big Big Block V8
  • Oval Port
  • Polished Finish
  • Free Shipping - Ships directly from the manufacturer
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    Does Weiand 6121WIN fit your vehicle?

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    1976-1978  GMC C35

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976  GMC C25 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1980-1986  CHEVROLET C30

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976  GMC C25

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1980-1986  GMC C2500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976-1980  CHEVROLET C10 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1980-1986  GMC C3500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1972  CHEVROLET TOWNSMAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1976  GMC G35

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: MAGNAVAN
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976-1980  CHEVROLET C20 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1972  CHEVROLET EL CAMINO

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: V
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1981  CHEVROLET C20 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: DELUXE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973-1974  GMC K25/K2500 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968-1969  GMC K35/K3500 PICKUP

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1975  GMC SPRINT

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CLASSIC
    • Engine Vin: U
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1989-1991  CHEVROLET V3500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEYENNE
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973-1974  GMC SPRINT

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970-1971  CHEVROLET CHEVELLE

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1970  PONTIAC LAURENTIAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1979-1980  GMC K3500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1988  CHEVROLET V30

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEYENNE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991-1992  CHEVROLET K2500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1985  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973-1974  GMC SPRINT

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1971  GMC C25/C2500 PICKUP

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1990  GMC R2500 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SLE
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968-1969  CHEVROLET C10 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1970-1971  CHEVROLET CHEVELLE

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976  GMC JIMMY

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976  GMC JIMMY

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1980  CHEVROLET K10

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970-1971  CHEVROLET CHEVELLE

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: MALIBU
    • Engine Vin: -
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1981  CHEVROLET K30

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEYENNE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976  GMC K25

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1988-1995  GMC C3500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA SLE
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1977-1978  GMC K25

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976-1980  CHEVROLET C20

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1980  CHEVROLET C10 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968-1969  CHEVROLET C20 PICKUP

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1980  CHEVROLET C10 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1988  CHEVROLET V30

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEYENNE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1972  CHEVROLET CAPRICE

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1988-1993  GMC C3500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA SLX
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1979-1980  CHEVROLET C20 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1987-1989  GMC R3500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1987  CHEVROLET R20 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1987-1988  CHEVROLET R20

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973-1974  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1977-1978  GMC K25

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968-1969  CHEVROLET C20 PICKUP

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1974  GMC C25/C2500 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1972  CHEVROLET CHEVELLE

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CONCOURS
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973-1974  GMC SPRINT

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1990  GMC R2500 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SLE
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1980  GMC C1500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968-1969  CHEVROLET C10 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1985  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1974  CHEVROLET LAGUNA

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: TYPE S-3
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970-1971  CHEVROLET MONTE CARLO

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1969  CHEVROLET NOVA

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1991-1993  GMC K2500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA SLX
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1979-1980  GMC C1500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1987-1989  GMC R2500 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1979-1980  GMC C2500 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973-1974  CHEVROLET MALIBU

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: ESTATE
    • Engine Vin: X
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1972  CHEVROLET KINGSWOOD

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: ESTATE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976  GMC JIMMY

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1980  CHEVROLET K30

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEYENNE
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1969  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1970-1971  CHEVROLET CHEVELLE

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: MALIBU
    • Engine Vin: -
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1976  GMC K25

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1980-1982  GMC C3500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970-1972  GMC C25/C2500 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1972  CHEVROLET CAPRICE

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1972  CHEVROLET EL CAMINO

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SS
    • Engine Vin: V
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976-1980  CHEVROLET C10 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976-1980  CHEVROLET C30

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1975  GMC C15 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: Z
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970-1971  CHEVROLET TOWNSMAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1980  CHEVROLET C10 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973-1974  GMC C25/C2500 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1972  CHEVROLET CAPRICE

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: V
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976  CHEVROLET G30

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEVY VAN
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1979-1980  CHEVROLET K10

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970-1971  CHEVROLET EL CAMINO

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SS
    • Engine Vin: -
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1980  CHEVROLET K10

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1987-1989  GMC R3500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1987-1988  CHEVROLET V30

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970-1971  GMC K35/K3500 PICKUP

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1973-1974  CHEVROLET K20 PICKUP

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970-1971  CHEVROLET EL CAMINO

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970-1971  CHEVROLET CHEVELLE

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: GREENBRIER
    • Engine Vin: -
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968-1969  CHEVROLET C20 PICKUP

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1973-1975  CHEVROLET IMPALA

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968-1969  GMC K25/K2500 PICKUP

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1992-1995  GMC C2500 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1971  GMC C25/C2500 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1990-1993  CHEVROLET C1500

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish; This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles~ The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles; 1968 and newer U.S. manufactured Federally Certified vehicles; 1968 and newer Foreign manufactured vehicle~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Uncontrolled [Non-Emissions Controlled] Vehicles: 1965 and older U.S. manufactured California Certified vehicles; 1967 and older U.S. manufactured Federally Certified vehicles; 1967 and older Foreign manufactured vehicle~ The following vehicles are considered Racing Us
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: 454 SS
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1987  GMC R2500 SUBURBAN

    • Fitment_Note: 177 B Oval Port; Lower Manifold; Polished Finish
    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: N
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    Items You Need

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.

    Tools:

    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.