COMP Cams Camshaft A8 291THR7 Thumper

If you're looking to build a serious street/strip machine with an AMC V8, this COMP Cams Mutha' Thumpr camshaft is a popular choice. It's designed to wake up engines like the AMC 290, 304, 343, 360, 390, and 401, giving them a noticeable performance edge. This camshaft fits a wide range of American Motors and Jeep vehicles, from classic muscle cars like the AMX and Javelin to workhorses like the Jeep CJ and J-series trucks.

This is a hydraulic roller camshaft with a 235/249 degree duration at 0.050-inch lift. That means it's built for aggressive performance, especially in the upper RPM range. To get the most out of it, you'll want at least 9:1 compression, a torque converter with a 2500 RPM stall speed or higher, and supporting modifications like an upgraded intake, proper gearing, and headers. Expect a rough, lopey idle that lets everyone know this engine means business.

When installing this camshaft, remember it's a significant performance upgrade. Ensure your engine's valvetrain components are in good condition and consider upgrading other parts to match the camshaft's capabilities. This camshaft is a key component for building a powerful AMC engine for weekend fun or track days.