Thumpr Series cam and lifter kits deliver a substantial power increase over an identical hydraulic flat tappet grind without sacrificing reliability or ease of maintenance. Upgrading your engines camshaft is a great way to add power and performance to your car, truck, or automotive vehicle. Thumpr camshafts are available in different grind profiles each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range. This gives you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. JEGSHydraulic Flat Tappet Camshaft for 1957-1985 Chevy 262-400. Trim levels were reorganized, with Custom becoming the new base.
Designers applied a new egg-crate design to the grille, and moved the Chevy 'bow-tie' logo to its center. The lobe profile and grind characteristics of these Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap to maximize the rough-idling characteristics of the cams. Chevrolet's 1971 line of light-duty trucks continued in the style introduced for 1967, with minor changes. In an ongoing quest to provide you with the performance and sound you demand, COMP Cams engineering team proudly introduces the Thumpr Series cam and lifter kits. COMP Cams is bringing the muscle car sound back, and it's nastier than ever! Let's face it-few things serve to grab our attention at a car show or cruise night more than a car with a thumping, high performance idle.