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

DBA Street Series Wheel Cylinder, For Daihatsu, Kit

DBA Street Series Wheel Cylinder, For Daihatsu, Kit

$60.30

Sonnax Rear Sun Gear, Allison, Mt 600 Series, Each

Sonnax Rear Sun Gear, Allison, Mt 600 Series, Each

$214.14

Oil Pump

Oil Pump

$127.72

Whiteline Mount Bushing, 46.5mm OD, 23mm ID, Mazda, Kit

Whiteline Mount Bushing, 46.5mm OD, 23mm ID, Mazda, Kit

$26.48

CVF Racing Alternator Bracket, Fuelie or Camel Hump Heads, LWP, For Chevrolet Small Block, Kit

CVF Racing Alternator Bracket, Fuelie or Camel Hump Heads, LWP, For Chevrolet Small Block, Kit

$177.28

DBA Front Street Series XGold Brake Rotor, 338mm, For BMW 135i E82 & E88 Twin Turbo 3.0L 2008-2010, Kit

DBA Front Street Series XGold Brake Rotor, 338mm, For BMW 135i E82 & E88 Twin Turbo 3.0L 2008-2010, Kit

$297.60