Thumpr™ Retro-Fit Hydraulic Roller Camshafts

Innovative new camshaft series delivers unrivaled high performance sound and idle quality, yet produces impressive performance gains


compthumprcams.jpgLet’s face it, 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 fact, one of the most frequent questions fielded when customers call our CAM HELP® tech line is “what camshaft will give my car that mean-sounding idle?” In their ongoing quest to provide customers with the performance that they demand, the COMP Cams® engineering team proudly introduces the Thumpr™ series of camshafts.

The Thumpr™ camshafts are a new series of retro-fit hydraulic roller camshafts designed for use in 1955-1998 262-400 cubic inch Small Block Chevrolet engines that were originally equipped with flat tappet camshafts. The reason that the new Thumpr™ Camshafts have such an aggressive exhaust note is that the lobe profiles and grind characteristics chosen by the COMP Cams® engineers produce 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 without negatively impacting the power output or streetability of the engine.

Thumpr™ Camshafts are available in three different grind profiles, each one of which will produce a rough, racy exhaust note and impressive amounts of horsepower and torque at a different rpm range. Their cutting-edge hydraulic roller design means that they will deliver a substantial power increase over an identical hydraulic flat tappet grind without sacrificing reliability or ease of maintenance. So look no further than the  Thumpr™ line of camshafts -engineered to deliver that much sought-after ”thumping” idle quality to Small Block Chevy owners everywhere. For more information about the COMP Cams® Thumpr™ Small Block Chevrolet Retro-Fit Hydraulic Roller Camshafts or any other COMP Cams® product, call us at 1-800-999-0853, or visit them online at