![]() 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. 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. Find CHEVROLET 5. This gives you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. For example, a.038 - inch thick head gasket for a 350 Chevy would compute : 4.03 x. 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. COMPETITION CAMS DEGREE KIT Competition Cams sells a slick camshaft. 290 hp GM crate engine with 180cc/64cc chamber RHS heads. Lunati 10120102LK Bare Bones 224/234 Hydraulic Flat Cam/Lifter Kit for 262-400 Chevrolet Small Block. ![]() 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. Buy COMP Cams 12-602-4 Big Mutha Thumpr 243/257 Hydraulic Flat Cam for Chevrolet Small Block: Camshafts. 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.
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