COMP Cams proudly introduces the Thumpr series hydraulic roller cam and lifter kits. These camshafts are a series of hydraulic roller camshafts 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

CROWCAMS Camshaft Roller, For Holden V8, Each

CROWCAMS Camshaft Roller, For Holden V8, Each

$788.96

View
COMP Cams Cam / Lifters / Valvetrain Xtreme Energy Hydraulic Flat Advertised Duration 256 / 268

COMP Cams Cam / Lifters / Valvetrain Xtreme Energy Hydraulic Flat Advertised Duration 256 / 268

$932.54

View
CROWCAMS Camshaft, 243/243 Adv. Duration, .450/.450 in. Lift, For Ford BA 6 Cyl Exhaust Twin, Each

CROWCAMS Camshaft, 243/243 Adv. Duration, .450/.450 in. Lift, For Ford BA 6 Cyl Exhaust Twin, Each

$729.18

View
COMP Cams Camshaft, High Energy, Hydraulic Roller, Advertised Duration 269/264, Lift .511/.504, For Buick Grand National 231 V6, Each

COMP Cams Camshaft, High Energy, Hydraulic Roller, Advertised Duration 269/264, Lift .511/.504, For Buick Grand National 231 V6, Each

$897.10

View
COMP Cams Cam / Lifters / Valvetrain Xtreme Energy Hydraulic Flat Advertised Duration 240 / 248

COMP Cams Cam / Lifters / Valvetrain Xtreme Energy Hydraulic Flat Advertised Duration 240 / 248

$720.25

View
COMP Cams Cam/Lifters/Timing, Nostalgia Plus, Solid Flat, Advertised Duration 276/283, Lift .544/.539, For Chevrolet Big Block 396-454, Kit

COMP Cams Cam/Lifters/Timing, Nostalgia Plus, Solid Flat, Advertised Duration 276/283, Lift .544/.539, For Chevrolet Big Block 396-454, Kit

$719.07

View