- Cams & Valvetrain
- Camshafts
- Comp Cams Thumpr Hydraulic Flat Tappet Cams
Thumpr Camshafts are the hottest cams to hit the streets in more than a decade. That's because they give you the big cam sound you're looking for, without the drawbacks. Applying a camshaft design originally created for sports car endurance racing, they incorporate early exhaust valve opening, long exhaust duration, and a generous amount of intake and exhaust overlap. Best of all, Thumprs will not negatively impact power output or streetability.
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Features:- Three unique cam designs for each application that deliver excellent horsepower gains and broad torque curve; perfect choice for muscle cars and street rods
- Early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note
- Best with aftermarket converters and more rear gear
Thumpr Sound ClipCamshaft & Lifter Kits are indicated by a CL in their part number and include Camshaft, Lifters, Assembly Lube, Decals, and Instructions.
Complete Kits are indicated by a K in their part number and include Camshaft, Lifters, Timing Chain & Gears, Valve Springs, Retainers, Locks, Assembly Lube, Decals, and Instructions.
AMC 290-401
COMP Cams Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft Lift .512"/.497" Duration 295/312 RPM Range 2500-6400
Lift .512"/.497"
Duration 295/312
RPM Range 2500-6400
COMP Cams Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft and Lifter Kit Lift .512"/.497" Duration 295/312 RPM Range 2500-6400
Lift .512"/.497"
Duration 295/312
RPM Range 2500-6400
COMP Cams Mutha" Thumpr Hydraulic Flat Tappet Camshaft Lift .500"/.486" Duration 287/304 RPM Range 2200-6100
Lift .500"/.486"
Duration 287/304
RPM Range 2200-6100
COMP Cams Mutha" Thumpr Hydraulic Flat Tappet Camshaft and Lifter Kit Lift .500"/.486" Duration 287/304 RPM Range 2200-6100
Lift .500"/.486"
Duration 287/304
RPM Range 2200-6100
COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Complete Kit Lift .491"/.476" Duration 279/296 RPM Range 2000-5800
Lift .491"/.476"
Duration 279/296
RPM Range 2000-5800
COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Complete Kit Lift .500"/.486" Duration 287/304 RPM Range 2200-6100
Lift .500"/.486"
Duration 287/304
RPM Range 2200-6100
COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Complete Kit Lift .512"/.497" Duration 295/312 RPM Range 2500-6400
Lift .512"/.497"
Duration 295/312
RPM Range 2500-6400
COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Lift .491"/.476" Duration 279/296 RPM Range 2000-5800
Lift .491"/.476"
Duration 279/296
RPM Range 2000-5800
COMP Cams Thumpr Hydraulic Flat Tappet Camshaft and Lifter Kit Lift .491"/.476" Duration 279/296 RPM Range 2000-5800
Lift .491"/.476"
Duration 279/296
RPM Range 2000-5800
Buick 350 c.i. 8 CYL. 1968-1980
COMP Cams Big Mutha Thumpr Hydraulic Flat Tappet Camshaft & Lifter Kit Lift .517"/.502" Duration 295/313 RPM Range 2500-6400
Lift .517"/.502"
Duration 295/313
RPM Range 2500-6400
COMP Cams Big Mutha Thumpr Hydraulic Flat Tappet Camshaft Complete Kit Lift .517"/.502" Duration 295/313 RPM Range 2500-6400
Lift .517"/.502"
Duration 295/313
RPM Range 2500-6400
COMP Cams Big Mutha Thumpr Hydraulic Flat Tappet Camshaft Lift .517"/.502" Duration 295/313 RPM Range 2500-6400
Lift .517"/.502"
Duration 295/313
RPM Range 2500-6400
COMP Cams Mutha Thumpr Hydraulic Flat Tappet Camshaft & Lifter Kit Lift .506"/.491" Duration 287/305 RPM Range 2200-6100
Lift .506"/.491"
Duration 287/305
RPM Range 2200-6100
COMP Cams Mutha Thumpr Hydraulic Flat Tappet Camshaft Lift .506"/.491" Duration 287/305 RPM Range 2200-6100
Lift .506"/.491"
Duration 287/305
RPM Range 2200-6100
COMP Cams Thumpr Hydraulic Flat Tappet Camshaft & Lifter Kit Lift .494"/.480" Duration 279/297 RPM Range 2000-5800
Lift .494"/.480"
Duration 279/297
RPM Range 2000-5800
COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Lift .494"/.480" Duration 279/297 RPM Range 2000-5800
Lift .494"/.480"
Duration 279/297
RPM Range 2000-5800
Buick 400, 430, 455 c.i. 8 CYL. 1967-1976
COMP Cams Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft Complete Kit Lift .517"/.502" Duration 295/313 RPM Range 2500-6400
Lift .517"/.502"
Duration 295/313
RPM Range 2500-6400
COMP Cams Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft Lift .517"/.502" Duration 295/313 RPM Range 2500-6400
Lift .517"/.502"
Duration 295/313
RPM Range 2500-6400
COMP Cams Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft and Lifter Kit Lift .517"/.502" Duration 295/313 RPM Range 2500-6400
Lift .517"/.502"
Duration 295/313
RPM Range 2500-6400
COMP Cams Mutha" Thumpr Hydraulic Flat Tappet Camshaft Complete Kit Lift .506"/.491" Duration 287/305 RPM Range 2200-6100
Lift .506"/.491"
Duration 287/305
RPM Range 2200-6100
COMP Cams Mutha" Thumpr Hydraulic Flat Tappet Camshaft Lift .506"/.491" Duration 287/305 RPM Range 2200-6100
Lift .506"/.491"
Duration 287/305
RPM Range 2200-6100
COMP Cams Mutha" Thumpr Hydraulic Flat Tappet Camshaft and Lifter Kit Lift .506"/.491" Duration 287/305 RPM Range 2200-6100
Lift .506"/.491"
Duration 287/305
RPM Range 2200-6100
COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Complete Kit Lift .494"/.480" Duration 279/297 RPM Range 2000-5800
Lift .494"/.480"
Duration 279/297
RPM Range 2000-5800
COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Lift .494"/.480" Duration 279/297 RPM Range 2000-5800
Lift .494"/.480"
Duration 279/297
RPM Range 2000-5800
COMP Cams Thumpr Hydraulic Flat Tappet Camshaft and Lifter Kit Lift .494"/.480" Duration 279/297 RPM Range 2000-5800
Lift .494"/.480"
Duration 279/297
RPM Range 2000-5800
Buick Nailhead 364, 401, 425, c.i. 8 CYL. 1957-1966(Classic Thumpr)
COMP Cams Big Mutha Thumpr Hydraulic Flat Tappet Camshaft Lift .501"/.486" Duration 295/313 RPM Range 2000-6000
Lift .501"/.486"
Duration 295/313
RPM Range 2000-6000
COMP Cams Mutha Thumpr Hydraulic Flat Tappet Camshaft Lift .490"/.475" Duration 287/305 RPM Range 1700-5500
Lift .490"/.475"
Duration 287/305
RPM Range 1700-5500
COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Lift .478"/.465" Duration 279/297 RPM Range 1500-5000
Lift .478"/.465"
Duration 279/297
RPM Range 1500-5000
Cadillac 425, 472, 500 c.i. 8 CYL. 1963-1979
COMP Cams Big Mutha Hydraulic Flat Tappet Camshaft and Lifter Kit Lift .528"/.512" Duration 294/312 RPM Range 2500-6400
Lift .528"/.512"
Duration 294/312
RPM Range 2500-6400
COMP Cams Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft and Lifter Kit Lift .528"/.512" Duration 294/312 RPM Range 2500-6400
Lift .528"/.512"
Duration 294/312
RPM Range 2500-6400