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, durability, and ease of installation.

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COMP Cams Cam / Lifters / Valvetrain Thumpr Hydraulic Roller Cam Advertised Duration 283 / 303 L

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COMP Cams Camshaft, Tri-Power Xtreme, Advertised Duration 247/257, Lift 0.484/0.475, For Ford 4.6/5.4L Modular 2 Valve, Each

COMP Cams Camshaft, Tri-Power Xtreme, Advertised Duration 247/257, Lift 0.484/0.475, For Ford 4.6/5.4L Modular 2 Valve, Each

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COMP Cams Cam/Lifters/Timing, High Energy, Hydraulic Flat Cam, Advertised Duration 252/252, Lift 0.433/0.433, AMC 290-401

COMP Cams Cam/Lifters/Timing, High Energy, Hydraulic Flat Cam, Advertised Duration 252/252, Lift 0.433/0.433, AMC 290-401

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COMP Cams Cam/Lifters/Timing, Xtreme Energy, Hydraulic Roller, Advertised Duration 294/300, Lift .540/.562, For Chevrolet Small Block

COMP Cams Cam/Lifters/Timing, Xtreme Energy, Hydraulic Roller, Advertised Duration 294/300, Lift .540/.562, For Chevrolet Small Block

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COMP Cams Camshaft, Magnum, Solid Flat, Advertised Duration 270/270, Lift .530/.530, For Chevrolet Big Block 396-454, Each

COMP Cams Camshaft, Magnum, Solid Flat, Advertised Duration 270/270, Lift .530/.530, For Chevrolet Big Block 396-454, Each

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COMP Cams Camshaft, Oval Track, Solid Roller, Advertised Duration 288/296, Lift .672/.672, For Ford 351W, Each

COMP Cams Camshaft, Oval Track, Solid Roller, Advertised Duration 288/296, Lift .672/.672, For Ford 351W, Each

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