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.
Chevelle, Camaro, Corvette, Stingray, Silverado, C10, Firebird, Chevrolet, Big Block, Chevy, BBC, 454, 427, 502, 396, Caprice, Malibu, Impala, Nova, Monte Carlo, S10, 572
High performance street, stock converter ok, best with 2000+ converter and gears. Choppy/thumping idle. Nitrided.
Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts
COMP Cams Thumpr 279TH-7 Nitrided Hydraulic Camshaft for Big Block Chevy
Thumpr NIT 227/241 Hydraulic Flat Cam for Chevrolet Big Block 396-454
Thmp NIT 227/241 Hyd FlatCam BBC 396-454
55TRIDED CamShaft, CB 279T H7 T THUMPR
COMP Cams Nitrided Camshaft CB 279T H7
T NIT 227/241 HFTBBC
Engine Camshaft
None