COMP Cams Cam & Lifter Kit CS XR276HR-1

This is the COMP Cams CS XR276HR-1 hydraulic roller camshaft and lifter kit, designed for Chevrolet Gen 1 Small Block engines. It's a popular choice for those looking to improve their engine's performance, especially in applications like jet boats where strong mid-range power is crucial. This kit includes the camshaft, lifters, assembly lube, decals, and instructions, so you have the essentials to get started on your build.

The XR276HR-1 camshaft features a 224/230 degree intake/exhaust duration at .050 lift, which is tuned for a strong pull in the mid-range RPM band. To get the most out of this camshaft, it's recommended to pair it with a good exhaust system to help the engine breathe freely. This kit is intended for engines that originally used a flat tappet camshaft; it does not fit factory roller small blocks from 1985 and newer, nor does it fit LS-based engines. Always confirm your engine's configuration before ordering, as GM transitioned to roller cams gradually.

For optimal performance and longevity, proper installation is key. The included assembly lube is essential for breaking in the new camshaft and lifters. While this kit is designed to fit a wide range of Chevrolet Small Block Gen 1 engines, including popular displacements like the 350 and 400, it's important to verify fitment for your specific application, especially regarding the factory roller versus flat tappet setup. Early 265 engines may also require a specific oiling groove on the 5th journal.