COMP Cams Camshaft Kit CS XR300H-R10

This COMP Cams Xtreme Energy Camshaft Kit (K-Kit) is a comprehensive package designed for Chevrolet Small Block Gen 1 engines. Inside the box, you'll find the camshaft itself, a set of hydraulic roller lifters, valve springs, retainers, valve locks, valve stem seals, a timing chain set, and assembly lube. It also includes decals and instructions to help you through the installation process.

This kit is built for pro street and bracket racing applications, and it's tuned for engines with around 10:1 compression and a 3500+ stall converter, paired with good intake and header setups. It's known for producing a very rough idle, which is characteristic of aggressive camshaft profiles like this one. The camshaft features a 248-degree intake and 254-degree exhaust duration at .050 inch lift, making it a potent upgrade for performance builds. It's important to note that this camshaft is designed for older, non-factory roller blocks; if your 1985 or newer small block has a factory roller setup, you'll need to verify its compatibility by checking the intake or timing cover.

This kit fits a wide range of Chevrolet Gen 1 Small Block engines, including popular displacements like the 350, 400, and 327, among others. It's a significant upgrade for enthusiasts looking to extract maximum performance from their classic Chevrolet V8. Remember to consult the included instructions for proper installation and break-in procedures.