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Flowtech Header Back Super Street Dual Kit 1973-87 Chevy/GMC 1/2, 3/4 & 1 Ton Pickups

387-51525

made in usa

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Flowtech 51525
$169.95
Header Back Super Street Dual Kit
  • 1973-87 Chevy/GMC 1/2, 3/4 & 1 Ton Pickups
  • Small Block Chevy 305-400ci
  • 4WD Only
  • Free Shipping - Ships directly from the manufacturer on 04/17/20
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    Does Flowtech 51525 fit your vehicle?

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    1977-1978  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1977-1978  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1979  GMC K1500

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1977-1978  GMC K35

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975  GMC K25 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: M
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1979  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1975-1976  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: V
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1980  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1985-1986  CHEVROLET K20

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976-1981  CHEVROLET K20

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEYENNE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973-1974  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: W
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976-1978  GMC K25 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1980  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975  CHEVROLET K20

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEYENNE
    • Engine Vin: Y
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1979  CHEVROLET K10

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1978  GMC K35

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975-1976  GMC K25 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: V
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1980  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978  GMC K35

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976-1978  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981-1983  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM
    • Engine Vin: H
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1976-1978  GMC K15 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980-1986  GMC K2500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975  GMC K25 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: M
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1978  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1975  CHEVROLET K10

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: Y
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976-1983  CHEVROLET K20

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: U
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1979  CHEVROLET K20

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1973-1974  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: W
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1980  GMC K1500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975  GMC K25

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: M
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: INDY HAULER
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980-1981  GMC K1500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1980  CHEVROLET K30

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1986  GMC C2500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978  GMC K25 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1975-1976  GMC K25 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: V
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1979  CHEVROLET K10

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1975-1976  CHEVROLET K20

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: V
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: Y
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976  GMC K15 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: U
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1978  GMC K35

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1978  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1973-1974  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: W
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981  CHEVROLET K10

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: DELUXE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975-1976  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: V
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: M
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1980  CHEVROLET K30

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980  GMC K1500

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975  CHEVROLET K10

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: Y
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978  GMC K25 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1982  GMC K1500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: H
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1981-1986  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1980  GMC K3500

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1978  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1978  GMC K15 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975  GMC K25

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: M
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1984-1985  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM
    • Engine Vin: F
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1981-1986  CHEVROLET K20

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1980  CHEVROLET K30

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1978  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1980-1982  GMC K2500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980-1981  GMC K1500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978  GMC K25

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975  CHEVROLET K20

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: Y
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978  GMC K25 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1979-1986  GMC K1500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1983-1985  GMC K1500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: F
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1975  CHEVROLET K20

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEYENNE
    • Engine Vin: Y
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1975  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: M
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1978  GMC K15 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1980-1981  GMC K1500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: P
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981-1986  CHEVROLET K10

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: H
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1977-1978  GMC K15 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1977-1979  CHEVROLET K10

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: U
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )

    1979-1980  GMC K3500

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1981  GMC K2500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973-1974  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1974  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: V
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975  GMC K25

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: Y
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978  GMC K35

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1976  GMC K25

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1980-1986  CHEVROLET K30

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975  CHEVROLET K10

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: M
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1980-1981  GMC K1500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973-1974  CHEVROLET K10 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: W
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1980  CHEVROLET K30

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1974  CHEVROLET K20 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: V
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976  CHEVROLET K10

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: U
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1979  CHEVROLET K20

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEYENNE
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1974  GMC K25/K2500 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: V
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975  GMC K15

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles; This part is legal for sale or use on Racing Use Only Vehicles~ WARNING: It is against the law to install this part on an Emissions Controlled Vehicle~ The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: M
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1976  GMC K15 SUBURBAN

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: V
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980  CHEVROLET K20

    • Fitment_Note: 2.25 in. Tubing; Dual Kit; Dual Rear Exit; Incl. RH-LH Header Ext. Pipe/Ft. Tailpipe Ext. Pipe/RH-LH Tailpipes/Hardware; w/o Mufflers;Legal in California Only for Racing Vehicles
    • Liter: 5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: G
    • CUI: 305
    • EngineType: V8 ( 5 L / 305 )
    51525 - FlowTech Super Street Header/Manifold Back Dual Exhaust Kits is rated 3.3 out of 5 by 6.
    Rated 5 out of 5 by from perfect fit Fit like a champ and with my flowtec red hots it sounds great,and super fast delivery
    Date published: 2015-06-05
    Rated 4 out of 5 by from Great system everything fit like it should,good quality and complete
    Date published: 2016-12-01
    Rated 3 out of 5 by from Poor quality hardware included I mated this kit to flowtech headers and flowmaster delta 40 mufflers. It all fit fairly well and I couldn't be happier with the sound and performance, but, -2 stars for complete garbage exhaust clamps. I stripped every one trying to tighten the exhaust enough to seal. I ended up trashing them all and bought steel clamps from the local parts store. The hangers were adequate but also note that this kit does not have enough clamps to account for the mufflers either.
    Date published: 2019-10-16
    Rated 3 out of 5 by from Pipes Would be better if the parts were labeled as to the order in which they go and whether parts are for the tight or left side. Also some of the parts wete hard to put together because tolerances were too close or way loose.
    Date published: 2016-07-28
    Rated 3 out of 5 by from flowtech 51525 Decent kit for the price. I installed on a 2 wheel drive and had to modify the head pipes. The flared ends did not slip over the pipe so had to rent a pipe expander. Also the bends and lengths on mirror pieces were off.
    Date published: 2015-09-24
    Rated 2 out of 5 by from you get what you pay for Does not fit around the chevy K10 xfer case, despite the website's recommendation. Now I'm out the $150. Cheaply made and packaged, in fact my box was so thin it had torn all up the side during shpping by the time it was delivered to me. Return shipping would've cost me $50.00
    Date published: 2017-07-14
    • y_2020, m_4, d_4, h_12
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    Do you have a similar kit but in 3"

    Asked by: Jerke
    This is the only kit listed for this application in 4wd.
    Answered by: Rusty B
    Date published: 2018-06-08
    • y_2020, m_4, d_4, h_12CST
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    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.