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.
AMC; Jeep; 4.0; 290; XJ; Cherokee; Wagoneer; Comanche; Grand Wagoneer; Wrangler; JK; Rambler; Eagle; ZJ; Chrysler; AM General; American Motors; 327; 390; 304; 327; 343; 360; 5.9; Rebel; Nash; AMX; Javelin
Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Thumpr 243/257 Hydraulic Flat Cam for AMC 290-401
COMP Cams Camshaft A8 295T H-107 T Thumper
Thmpr 243/257 H-Flat Cam for AMC 290-401
Fits AMC 290, 304, 343, 360, 390 and 401
CAMSHAFT, A8 295T H-107 T THUM PR
T 243/257 HFTAMC
Engine Camshaft
None
