COMP Cams is bringing the musclecar sound back, and it's nastier than ever! Few things grab our attention at a car show or cruise-in like a thumping, high performance idle. In fact, one of the most frequent questions from customers is, "What camshaft will give my car that mean-sounding idle?" For the performance and sound you demand, COMP Cams engineers introduce the Thumpr camshafts—a new series of hydraulic flat tappet cams. The lobe profile and grind characteristics of Thumprs use a combination of early exhaust valve opening, long exhaust duration, and a generous amount of intake and exhaust overlap—to maximize the rough-idling characteristics of the cams. They give you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in several grind profiles; each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range.

More From This Category

COMP Cams Camshaft, Hydraulic Flat Tappet, Advertised Duration 246/263, Lift .429/.438, For Chevrolet, Small Block, Each

COMP Cams Camshaft, Hydraulic Flat Tappet, Advertised Duration 246/263, Lift .429/.438, For Chevrolet, Small Block, Each

$450.44

COMP Cams Camshaft, Drag Race, Solid Roller, Advertised Duration 322/339, Lift .806/.758, For Chevrolet Big Block 396-454, Each

COMP Cams Camshaft, Drag Race, Solid Roller, Advertised Duration 322/339, Lift .806/.758, For Chevrolet Big Block 396-454, Each

$955.99

COMP Cams Cam/Lifters/Timing, Magnum, Solid Flat, Advertised Duration 306/306, Lift .555/.555, For Chrysler 383-440, Kit

COMP Cams Cam/Lifters/Timing, Magnum, Solid Flat, Advertised Duration 306/306, Lift .555/.555, For Chrysler 383-440, Kit

$1,064.53

COMP Cams Camshaft, Specialty Camshaft, Hydraulic Roller, Adver. Dur. 270 Int./276 Exh, Each

COMP Cams Camshaft, Specialty Camshaft, Hydraulic Roller, Adver. Dur. 270 Int./276 Exh, Each

$1,083.98

COMP Cams Cam/Lifters/Timing, Thumpr, Hydraulic Flat, Advertised Duration 279/297, Lift .479/.465, For Chevrolet Small Block, Kit

COMP Cams Cam/Lifters/Timing, Thumpr, Hydraulic Flat, Advertised Duration 279/297, Lift .479/.465, For Chevrolet Small Block, Kit

$1,165.75

COMP Cams Camshaft, XFI, Hydraulic Roller Cam, Advertised Duration 286/300, Lift 0.579/0.579, For Ford 351W, Each

COMP Cams Camshaft, XFI, Hydraulic Roller Cam, Advertised Duration 286/300, Lift 0.579/0.579, For Ford 351W, Each

$1,083.98