COMP Cams Cam & Lifter Kit CB 291T HR-7

If you're looking to significantly boost the performance of your Chevrolet Big Block engine, this COMP Cams Mutha Thumpr hydraulic roller cam and lifter kit is a solid choice. It's built for the 396 to 454 cubic inch engines originally equipped with flat tappet camshafts, and it's designed for serious street and strip use. This kit includes the camshaft, hydraulic roller lifters, assembly lube, decals, and instructions, so you have the core components needed for the upgrade.

This camshaft features a 235/249 degree intake/exhaust duration at .050 lift and requires a minimum of 9:1 compression to perform optimally. You'll also need a 2500+ stall speed torque converter, a good intake manifold, appropriate gearing, and headers to get the most out of this setup. Expect a rough idle with this aggressive profile, which is characteristic of high-output street/strip cams. COMP Cams is a well-known name in performance engine building, and this kit is a popular option for those seeking a noticeable increase in power and torque.

When installing this kit, remember that it's intended for engines originally fitted with flat tappet camshafts, and it utilizes a hydraulic roller design for improved performance and durability over traditional flat tappets. Ensure your engine's compression ratio, fuel system, and exhaust are up to the task to safely and effectively utilize the power this cam unlocks. This kit is not CARB approved and cannot be shipped to California.