![]() Each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range. Thumpr camshafts are available in three different grind profiles. They give you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. The lobe profile and grind characteristics 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. ![]() They are a series of camshafts designed for use in engines that were originally equipped with flat tappet camshafts. In an ongoing quest to provide you with the performance and sound you demand, COMP Cams' engineering team proudly introduces the Thumpr retrofit hydraulic roller camshafts. 7 - Stock springs cannot be used.10 - Requires thrust button and wear plate.46 - Must use bronze tip fuel pump pushrod when using high pressure or high volume pump.ĬOMP Cams Thumpr Retrofit Hydraulic Roller CamshaftsĬOMP Cams is bringing back the musclecar sound-and it's nastier than ever! Few things grab our attention at a car show or cruise night more than a car with a thumping high performance idle.
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