![]() ![]() ![]() ![]() Chevrolet's 1971 line of light-duty trucks continued in the style introduced for 1967, with minor changes. 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. Trim levels were reorganized, with Custom becoming the new base.ĭesigners applied a new egg-crate design to the grille, and moved the Chevy 'bow-tie' logo to its center. JEGSHydraulic Flat Tappet Camshaft for 1957-1985 Chevy 262-400. This gives you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. 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. Upgrading your engines camshaft is a great way to add power and performance to your car, truck, or automotive vehicle. 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. ![]()
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