COMP Cams is bringing the musclecar sound back, and it's nastier than ever! Few things serve to 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 that you demand, COMP Cams' engineering team proudly introduces the Thumpr Series hydraulic roller cam and lifter kits. They are designed for use in engines that were originally equipped with flat tappet camshafts. The lobe profile and grind characteristics of these Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap. They're designed to maximize the rough-idling characteristics of the cams, giving you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. They 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. Thumpr Series cam and lifter kits feature a cutting-edge hydraulic roller design that delivers a substantial power increase over an identical hydraulic flat tappet grind without sacrificing reliability or ease of maintenance.

More From This Category

Dart Valve Spring Retainer, 1.550 Outside Diameter, 10 Degree, Each

Dart Valve Spring Retainer, 1.550 Outside Diameter, 10 Degree, Each

$10.28

View
CROWCAMS Lifter Hydraulic, For Chevrolet SB V8 Retro fit to 1986, .840 in. Body Dia., .750 in. Dia., 550 Max. Pressure, Set

CROWCAMS Lifter Hydraulic, For Chevrolet SB V8 Retro fit to 1986, .840 in. Body Dia., .750 in. Dia., 550 Max. Pressure, Set

$1,788.31

View
ICON Piston, 4 in. Bore, 1/16, 1/16, 3/16 in. Ring Grooves, For Ford 393Wci/6.4L (V8), .040 Oversized, w/ Rings, Each

ICON Piston, 4 in. Bore, 1/16, 1/16, 3/16 in. Ring Grooves, For Ford 393Wci/6.4L (V8), .040 Oversized, w/ Rings, Each

$1,530.60

View
COMP Cams Cam / Lifters / Valvetrain Blower and Turbo Solid Flat Advertised Duration 310 / 320 L

COMP Cams Cam / Lifters / Valvetrain Blower and Turbo Solid Flat Advertised Duration 310 / 320 L

$1,204.98

View
Crow Cams FORD SOLID LIFTERS 8 CYL. SET

Crow Cams FORD SOLID LIFTERS 8 CYL. SET

$216.31

View
MANLEY Connecting Rod, Pro Series I-Beam, 6.125 in. Length, For Chevrolet SB, w/ ARP625, Each

MANLEY Connecting Rod, Pro Series I-Beam, 6.125 in. Length, For Chevrolet SB, w/ ARP625, Each

$482.86

View