COMP 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. 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. They are a series of camshafts designed for use in engines that were originally equipped with flat tappet camshafts. 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 give you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in three different grind profiles. Each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range. COMP Cams Thumpr Series camshafts feature a cutting-edge hydraulic roller design that delivers a substantial power increase over identical hydraulic flat tappet grinds—without sacrificing reliability or ease of maintenance.

More From This Category

COMP Cams Camshaft, Magnum, Hydraulic Flat, Advertised Duration 305/305, Lift .585/.585, For Ford 429,460, Each

COMP Cams Camshaft, Magnum, Hydraulic Flat, Advertised Duration 305/305, Lift .585/.585, For Ford 429,460, Each

$482.21

View
COMP Cams Camshaft, Xtreme Energy, Hydraulic Flat, Advertised Duration 284/296, Lift .584/.588, For Ford 429,460, Each

COMP Cams Camshaft, Xtreme Energy, Hydraulic Flat, Advertised Duration 284/296, Lift .584/.588, For Ford 429,460, Each

$484.86

View
Crow Cams Camshaft, Ford 429-460 Big Block Hydraulic, Adv. Duration 280/293, Valve Lift 0.512/0.539

Crow Cams Camshaft, Ford 429-460 Big Block Hydraulic, Adv. Duration 280/293, Valve Lift 0.512/0.539

$331.90

View
COMP Cams Camshaft, Xtreme Energy, Hydraulic Flat, Advertised Duration 274/286, Lift .562/.565, For Ford 352-428, Each

COMP Cams Camshaft, Xtreme Energy, Hydraulic Flat, Advertised Duration 274/286, Lift .562/.565, For Ford 352-428, Each

$466.91

View