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. 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

MANLEY Valve, Custom, Titanium, .3135 in. Stem Dia, Set of 8

MANLEY Valve, Custom, Titanium, .3135 in. Stem Dia, Set of 8

$2,550.76

MANLEY Valve, Race Master, Intake, 42mm Head Dia, 0.313 in. Stem Dia, 4.606 in. Length, Volkswagen, Each

MANLEY Valve, Race Master, Intake, 42mm Head Dia, 0.313 in. Stem Dia, 4.606 in. Length, Volkswagen, Each

$47.58

Trick Flow Valve Lock, Machined, Hardened Steel, 10 Degree, 1-Groove, 11/32 in. Valve Stem, Pair

Trick Flow Valve Lock, Machined, Hardened Steel, 10 Degree, 1-Groove, 11/32 in. Valve Stem, Pair

$21.03

COMP Cams Pushrod, Magnum, Chromoly, Heat-Treated 7.200 in. Long, .080 in. Wall, 5/16 in. Diameter, Set of 16

COMP Cams Pushrod, Magnum, Chromoly, Heat-Treated 7.200 in. Long, .080 in. Wall, 5/16 in. Diameter, Set of 16

$309.03

COMP Cams Camshaft, Xtreme Energy, Solid Roller Cam, Advertised Duration 274/280, Lift .564/.57, For Chrysler 283-440, Each

COMP Cams Camshaft, Xtreme Energy, Solid Roller Cam, Advertised Duration 274/280, Lift .564/.57, For Chrysler 283-440, Each

$1,071.34

RaceTec Pistons, AutoTec, SBC 23deg 4.125, Inverted Dome/Milled Dish, 0.04 Oversize, 4.165 Bore,

RaceTec Pistons, AutoTec, SBC 23deg 4.125, Inverted Dome/Milled Dish, 0.04 Oversize, 4.165 Bore,

$1,313.54