CL Kits include a camshaft, a set of lifters, instructions and assembly lubricant.
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.
Perfect choice for muscle cars and street rods - Three unique cam designs: Thumpr, Mutha' Thumpr and Big Mutha' Thumpr deliver excellent horsepower gains and broad torque curve.
Fits Chevrolet 396-454 Mark IV Big Block
Made in USA
This Big Block Chevrolet Big Mutha' Thumpr hydraulic cam and lifter kit is best for street/strip applications. It needs 9.5:1 compression, with a 2800+ stall, good intake manifold, lower gears and headers. It will produce a very rough idle.