COMP Cams Cam & Lifter Kit CS XR300HR-1

If you're building a pro street or bracket racing machine with a Chevrolet Small Block engine, this COMP Cams Xtreme Energy camshaft and lifter kit is designed to give you the aggressive performance you're looking for. This kit is specifically tuned for engines running around 10:1 compression, a 3500+ RPM stall torque converter, good intake manifold, and headers. Expect a very rough idle, which is characteristic of a high-performance camshaft like this one, indicating it's ready to make serious power.

The kit includes a camshaft with a 248-degree intake and 254-degree exhaust duration at .050 lift, paired with matching hydraulic roller lifters. This combination is built for durability and performance in demanding applications. COMP Cams also includes assembly lube and instructions to help ensure a smooth installation process. This kit is a popular choice for enthusiasts looking to extract maximum performance from their classic Chevrolet V8 engines.

This kit fits a wide range of Chevrolet GEN 1 Small Block engines, including popular displacements like the 350, 400, and others. It's important to verify your engine is a flat tappet design, as this kit is not compatible with factory roller camshafts from 1985 and newer, nor is it compatible with LS-based engines. For 1955-1957 Chevrolet 265 engines, ensure there is a groove on the 5th cam journal for proper oiling.