COMP Cams Camshaft CRB3 291Th R7 Thumper

This COMP Cams Mutha' Thumpr camshaft features a 235/249 degree intake/exhaust duration at .050 inch lift, a design choice that helps it make serious power on the street and at the drag strip. It's built as a hydraulic roller camshaft, which means it's designed for reduced friction and wear compared to flat tappet designs, allowing for more aggressive profiles and better performance over time. This camshaft is intended for Mopar B and RB series engines, specifically the 383, 400, 413, 426 Wedge, and 440 cubic inch V8s, utilizing a 3-bolt camshaft design for secure mounting.

To get the most out of this camshaft, it requires a solid foundation of supporting modifications. You'll need at least 9:1 compression ratio, a torque converter with a 2500 RPM stall speed or higher, an upgraded intake manifold, appropriate rear axle gearing, and performance exhaust headers. Expect a rough idle with this camshaft; it's tuned for maximum performance rather than quiet operation. This is a popular choice for builders looking to significantly increase the power output of their classic Mopar V8 for demanding street and strip applications.

This camshaft fits a wide range of Chrysler, Dodge, and Plymouth vehicles from the late 1950s through the late 1970s, including models like the Dodge Charger, Plymouth Barracuda, and Chrysler New Yorker. It's important to note that this camshaft is not CARB approved and cannot be shipped to California. Ensure all supporting modifications are in place before installation to achieve the intended performance gains and engine longevity.