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.
COMP Cams Thumpr 283THR7 Retro-Fit Hydraulic Roller Camshaft for Ford 351 Cleveland, 351-400 Modified
High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping idle.
Ford, 351, 351 Cleveland, 400, 351 Modified, 400 Modified, Ford F100, Mach 1, Mustang
Fits Ford 351 Cleveland, 351 Modified, 351 Cobra-Jet, Boss 351, 400 Modified
Thumpr 227/241 Hydraulic Roller Cam for Ford 351C, 351M-400M
COMP Cams Camshaft FC 283Th R7 Thumper R
Thmpr 227/241 H-Rlr Cam Ford 351C/M-400M
CamShaft, FC 283TH R7 THUMPR R F
T 227/241 HRlr351C
Engine Camshaft
None