COMP Cams Thumpr Retrofit Hydraulic Roller Cam and Lifter Kits

4.62 out of 5 stars 21 Customer Reviews

Musclecar sound is back and nastier than ever with these Thumpr retrofit hydraulic roller cam and lifter kits from COMP Cams! These cams feature a thumping high per

Musclecar sound is back and nastier than ever with these Thumpr retrofit hydraulic roller cam and lifter kits from COMP Cams! These cams feature a thumping high performance idle and provide significant horsepower and torque increases. Specially engineered profiles are offered for each unique engine, providing the perfect combination of an early intake valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap to maximize your engine's nasty-idling characteristics without negatively impacting streetability. These kits include high-quality matched lifters for unbeatable performance, dur