COMP Cams Camshaft 364-425 287T H-107 T

This is the COMP Cams Classic Mutha' Thumpr camshaft, part number 91-601-5, designed for Buick 364, 401, and 425 Nailhead engines. If you're looking to give your classic Buick a serious performance boost for street and strip use, this camshaft is a popular choice. It's built to deliver a noticeable increase in power, especially when paired with other performance upgrades.

This camshaft features a 227-degree intake and 241-degree exhaust duration at .050 lift, with a .450/.450 lift. It's designed to work best with at least 9:1 compression, a 2500+ RPM stall torque converter, and performance intake, gears, and headers. You can expect a very rough idle with this camshaft, which is characteristic of its aggressive performance profile. For optimal performance and to safely raise the engine's RPM limit, head modifications are recommended. This camshaft is not CARB approved and cannot be shipped to California.

This part fits a wide range of Buick vehicles from the late 1950s through the mid-1960s, including models like the Electra, Riviera, and Wildcat. When installing this camshaft, consider that it's intended for a performance build and will produce a rough idle. Ensure you have the necessary supporting modifications and components to take full advantage of its capabilities.