COMP Cams Cam & Lifter Kit CS XR300HR-1

When you open this box, you'll find the COMP Cams CL08-444-8 kit, which includes the Xtreme Energy XR300HR-1 camshaft, a set of hydraulic roller lifters, assembly lube, decals, and installation instructions. This kit is built for Small Block Chevrolet engines that came factory-equipped with roller camshafts, specifically targeting applications like pro street builds and bracket racing where you need a significant performance bump.

This camshaft is designed with a 248-degree intake and 254-degree exhaust duration at .050 lift, making it a solid choice for engines with 10.0:1 or higher compression ratios. It pairs well with a 3500+ RPM stall torque converter and good breathing components like an open intake and headers. The hydraulic roller design means less friction and more consistent valve train operation compared to flat tappet cams, contributing to its performance potential and durability in demanding use.

This kit is intended for '87 and later GEN 1 Chevrolet 305-350 Small Blocks that originally used a factory roller camshaft. It's important to note that this kit is not compatible with LT-1 or LS1 style engines. Ensure your engine has the correct factory roller setup before installation. While this kit offers a substantial performance increase, it is not CARB approved and cannot be shipped to California.