Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early intake valve opening and long exhaust duration create optimum overlap for that race car idle. The Thumpr grinds all require an aftermarket torque converter and lower gear ratio to ensure the drivetrain always puts the engine in its powerband. Additionally, Thumpr camshafts typically deliver reduced vacuum at idle, making a vacuum canister, pump or hydroboost a requirement for vehicles running power brakes.
Catalog
User 1


This Part Fits:

Year	Make	Model	Submodel
1987-1991	Avanti	II	Base
1991-1996	Buick	Commercial Chassis	Base
1992-1993	Buick	Roadmaster	Base
1991-1993	Buick	Roadmaster	Estate Wagon
1992-1993	Buick	Roadmaster	Limited
1990-1992	Cadillac	Brougham	Base
1990-1992	Cadillac	Brougham	d'Elegance
1994-1996	Cadillac	Commercial Chassis	Base
1992-1996	Cadillac	Commercial Chassis	Brougham
1993	Cadillac	Fleetwood	Base
1993	Cadillac	Fleetwood	Brougham
1994	Chevrolet	Blazer	Base
1992-1993	Chevrolet	Blazer	Cheyenne
1987	Chevrolet	Blazer	Custom Deluxe
1988-1991	Chevrolet	Blazer	Scottsdale
1987-1994	Chevrolet	Blazer	Silverado
1994	Chevrolet	Blazer	Silverado Sport
1994-1995	Chevrolet	C1500	Base
1988-1995	Chevrolet	C1500	Cheyenne
1988-1992	Chevrolet	C1500	Scottsdale
1988-1995	Chevrolet	C1500	Silverado
1990-1995	Chevrolet	C1500	WT
1992-1995	Chevrolet	C1500 Suburban	Base
1995	Chevrolet	C1500 Suburban	LS
1995	Chevrolet	C1500 Suburban	LT
1992-1994	Chevrolet	C1500 Suburban	Silverado
1994-1995	Chevrolet	C2500	Base
1988-1995	Chevrolet	C2500	Cheyenne
1988-1992	Chevrolet	C2500	Scottsdale
1988-1995	Chevrolet	C2500	Silverado
1994-1995	Chevrolet	C2500	WT
1992-1995	Chevrolet	C2500 Suburban	Base
1995	Chevrolet	C2500 Suburban	LS
1995	Chevrolet	C2500 Suburban	LT
1992-1994	Chevrolet	C2500 Suburban	Silverado
1994-1995	Chevrolet	C3500	Base
1988-1995	Chevrolet	C3500	Cheyenne
1988-1992	Chevrolet	C3500	Scottsdale
1988-1995	Chevrolet	C3500	Silverado
1988	Chevrolet	Camaro	Base
1987-1990	Chevrolet	Camaro	Iroc-Z
1987	Chevrolet	Camaro	LT
1989-1992	Chevrolet	Camaro	RS
1992	Chevrolet	Camaro	RS Heritage Edition
1987	Chevrolet	Camaro	Sport
1987,1991-1992	Chevrolet	Camaro	Z28
1992	Chevrolet	Camaro	Z28 Heritage Edition
1987-1992	Chevrolet	Caprice	Base
1987-1993	Chevrolet	Caprice	Classic
1987-1990	Chevrolet	Caprice	Classic Brougham
1993	Chevrolet	Caprice	Classic LS
1987-1990	Chevrolet	Caprice	Classic LS Brougham
1991-1993	Chevrolet	Caprice	Classic LTZ
1991-1994	Chevrolet	Commercial Chassis	Base
1988	Chevrolet	Corvette	35th Anniversary Edition
1987-1991	Chevrolet	Corvette	Base
1990-1991	Chevrolet	Corvette	ZR-1
1987	Chevrolet	El Camino	Base
1987	Chevrolet	El Camino	SS
1998	Chevrolet	Express 1500	Base
1996	Chevrolet	Express 2500	LS
1998	Chevrolet	Express 3500	Base
1987-1995	Chevrolet	G10	Beauville
1987	Chevrolet	G10	Bonaventure
1987-1995	Chevrolet	G10	Chevy Van
1987-1995	Chevrolet	G10	Sportvan
1987-1995	Chevrolet	G20	Beauville
1987-1995	Chevrolet	G20	Chevy Van
1987-1995	Chevrolet	G20	Sportvan
1987-1996	Chevrolet	G30	Beauville
1987-1996	Chevrolet	G30	Chevy Van
1987-1996	Chevrolet	G30	Hi-Cube
1987-1996	Chevrolet	G30	Sportvan
1994-1995	Chevrolet	K1500	Base
1988-1995	Chevrolet	K1500	Cheyenne
1988-1992	Chevrolet	K1500	Scottsdale
1988-1995	Chevrolet	K1500	Silverado
1991	Chevrolet	K1500	Sport
1990-1995	Chevrolet	K1500	WT
1992-1995	Chevrolet	K1500 Suburban	Base
1995	Chevrolet	K1500 Suburban	LS
1995	Chevrolet	K1500 Suburban	LT
1992-1994	Chevrolet	K1500 Suburban	Silverado
1994-1995	Chevrolet	K2500	Base
1988-1995	Chevrolet	K2500	Cheyenne
1988-1992	Chevrolet	K2500	Scottsdale
1988-1995	Chevrolet	K2500	Silverado
1994-1995	Chevrolet	K2500	WT
1992-1995	Chevrolet	K2500 Suburban	Base
1995	Chevrolet	K2500 Suburban	LS
1995	Chevrolet	K2500 Suburban	LT
1992-1994	Chevrolet	K2500 Suburban	Silverado
1994-1995	Chevrolet	K3500	Base
1988-1995	Chevrolet	K3500	Cheyenne
1988-1992	Chevrolet	K3500	Scottsdale
1988-1995	Chevrolet	K3500	Silverado
1987-1988	Chevrolet	Monte Carlo	Base
1987-1988	Chevrolet	Monte Carlo	LS
1987-1988	Chevrolet	Monte Carlo	SS
1987-1989	Chevrolet	P20	Base
1987-1989	Chevrolet	P20	Step-Van
1987-1998	Chevrolet	P30	Base
1987-1990	Chevrolet	P30	Step-Van
1987	Chevrolet	R10	Custom Deluxe
1987	Chevrolet	R10	Scottsdale
1987	Chevrolet	R10	Silverado
1987	Chevrolet	R10 Suburban	Custom Deluxe
1987-1988	Chevrolet	R10 Suburban	Scottsdale
1987-1988	Chevrolet	R10 Suburban	Silverado
1989-1991	Chevrolet	R1500 Suburban	Scottsdale
1989-1991	Chevrolet	R1500 Suburban	Silverado
1988	Chevrolet	R20	Cheyenne
1987-1988	Chevrolet	R20	Custom Deluxe
1987-1988	Chevrolet	R20	Scottsdale
1987-1988	Chevrolet	R20	Silverado
1987	Chevrolet	R20 Suburban	Custom Deluxe
1987-1988	Chevrolet	R20 Suburban	Scottsdale
1987-1988	Chevrolet	R20 Suburban	Silverado
1989-1991	Chevrolet	R2500 Suburban	Scottsdale
1989-1991	Chevrolet	R2500 Suburban	Silverado
1988	Chevrolet	R30	Cheyenne
1987-1988	Chevrolet	R30	Custom Deluxe
1987-1988	Chevrolet	R30	Scottsdale
1987-1988	Chevrolet	R30	Silverado
1989-1991	Chevrolet	R3500	Cheyenne
1989-1990	Chevrolet	R3500	Scottsdale
1989-1991	Chevrolet	R3500	Silverado
1995	Chevrolet	Tahoe	Base
1995	Chevrolet	Tahoe	LS
1995	Chevrolet	Tahoe	LT
1987	Chevrolet	V10	Custom Deluxe
1987	Chevrolet	V10	Scottsdale
1987	Chevrolet	V10	Silverado
1987	Chevrolet	V10 Suburban	Custom Deluxe
1987-1988	Chevrolet	V10 Suburban	Scottsdale
1987-1988	Chevrolet	V10 Suburban	Silverado
1989-1991	Chevrolet	V1500 Suburban	Scottsdale
1989-1991	Chevrolet	V1500 Suburban	Silverado
1987	Chevrolet	V20	Custom Deluxe
1987	Chevrolet	V20	Scottsdale
1987	Chevrolet	V20	Silverado
1987	Chevrolet	V20 Suburban	Custom Deluxe
1987-1988	Chevrolet	V20 Suburban	Scottsdale
1987-1988	Chevrolet	V20 Suburban	Silverado
1989-1991	Chevrolet	V2500 Suburban	Scottsdale
1989-1991	Chevrolet	V2500 Suburban	Silverado
1988	Chevrolet	V30	Cheyenne
1987-1988	Chevrolet	V30	Custom Deluxe
1987-1988	Chevrolet	V30	Scottsdale
1987-1988	Chevrolet	V30	Silverado
1989-1991	Chevrolet	V3500	Cheyenne
1989-1990	Chevrolet	V3500	Scottsdale
1989-1991	Chevrolet	V3500	Silverado
1993	Excalibur	Limited	Base
1987-1989	Excalibur	Phaeton	Base
1988-1993	GMC	C1500	Sierra
1994-1995	GMC	C1500	Sierra SL
1988-1995	GMC	C1500	Sierra SLE
1994-1995	GMC	C1500	Sierra SLT
1988-1993	GMC	C1500	Sierra SLX
1994-1995	GMC	C1500	Sierra Special
1992-1995	GMC	C1500 Suburban	Base
1992-1995	GMC	C1500 Suburban	SLE
1995	GMC	C1500 Suburban	SLT
1988-1993	GMC	C2500	Sierra
1994-1995	GMC	C2500	Sierra SL
1988-1995	GMC	C2500	Sierra SLE
1994-1995	GMC	C2500	Sierra SLT
1988-1993	GMC	C2500	Sierra SLX
1992-1995	GMC	C2500 Suburban	Base
1992-1995	GMC	C2500 Suburban	SLE
1995	GMC	C2500 Suburban	SLT
1988-1993	GMC	C3500	Sierra
1994-1995	GMC	C3500	Sierra SL
1988-1995	GMC	C3500	Sierra SLE
1994-1995	GMC	C3500	Sierra SLT
1988-1993	GMC	C3500	Sierra SLX
1987	GMC	Caballero	Base
1987	GMC	Caballero	Diablo
1987-1995	GMC	G1500	Rally
1987-1995	GMC	G1500	Rally STX
1987-1995	GMC	G1500	Vandura
1987-1995	GMC	G2500	Rally
1987-1995	GMC	G2500	Rally STX
1987-1995	GMC	G2500	Vandura
1987-1996	GMC	G3500	Magnavan
1987-1996	GMC	G3500	Rally
1987-1996	GMC	G3500	Rally Camper Special
1987-1988	GMC	G3500	Rally Custom
1987-1996	GMC	G3500	Rally STX
1987-1996	GMC	G3500	Vandura
1987-1996	GMC	G3500	Vandura Special
1987-1991	GMC	Jimmy	Base
1987-1990	GMC	Jimmy	Sierra Classic
1988-1993	GMC	K1500	Sierra
1994-1995	GMC	K1500	Sierra SL
1988-1995	GMC	K1500	Sierra SLE
1995	GMC	K1500	Sierra SLS
1994-1995	GMC	K1500	Sierra SLT
1988-1993	GMC	K1500	Sierra SLX