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 i Product Features: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.Three unique cam designs for each application that deliver excellent horsepower gains and broad torque curve; perfect choice for muscle cars and street rods.
