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.

More From This Category

Trick Flow Valve, Intake, Stainless Steel, 1.840 in. Diameter, 7.0mm Stem, 118.11mm Length, For Ford 4.6L/5.4L, Each

Trick Flow Valve, Intake, Stainless Steel, 1.840 in. Diameter, 7.0mm Stem, 118.11mm Length, For Ford 4.6L/5.4L, Each

$59.16

COMP Cams Ultra Pro Magnum Rocker Arm Shaft 1621 For Chrysler 383-440 B/RB Shaft Kit

COMP Cams Ultra Pro Magnum Rocker Arm Shaft 1621 For Chrysler 383-440 B/RB Shaft Kit

$153.34

MANLEY Valve, Pro Flo, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Each

MANLEY Valve, Pro Flo, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Each

$75.93

MANLEY Wrist Pin, .906 in. Dia, 2.500 in. Length, .250 in. Wall Thickness, Round Wire, Set of 4

MANLEY Wrist Pin, .906 in. Dia, 2.500 in. Length, .250 in. Wall Thickness, Round Wire, Set of 4

$319.00

MANLEY Valve, Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.465 in. Length, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.465 in. Length, Set of 8

$607.34