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.

426 HEMI; 426; 392; Plymouth; Charger; Challenger; Six Pack; Barracuda; Cuda; Coronet; Wedge; B; RB; 440; 383; HEMI

Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.

COMP Cams Big Mutha' Thumpr 295TH-7 Hydraulic Camshaft for Chrysler 426 Hemi

Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chrysler 426 HEMI

COMP Cams Camshaft Crh 295T H-107 T Thu

Thumpr 243/257 Hyd Flat Cam 426 HEMI

CamShaft, CRH 295T H-107 T THUMPR

Fits Chrysler 426 HEMI

BMT 243/257 HFT426

Engine Camshaft

None