COMP Cams Cam & Lifter Kit CS XR270HR-1

This is the COMP Cams CS XR270HR-1 hydraulic roller camshaft and lifter kit, designed for Chevrolet Gen 1 Small Block engines. If you're looking to get more mid-range power out of your classic Chevy V8, this kit is a solid choice. It's built for engines like the 350, 305, and 400 cubic inch displacements, offering a noticeable idle and improved performance, especially when paired with headers and appropriate gearing.

This kit includes the camshaft, lifters, assembly lube, decals, and instructions needed to get the job done. The XR270HR-1 camshaft features a 220/224 degree duration at .050 inch lift and .525 inch lift on both intake and exhaust, making it well-suited for street performance applications. It's important to note that this kit is intended for engines with flat tappet camshafts; if your engine was built from 1985 or later and has a factory roller camshaft, this kit will not be compatible. You may need to remove the intake manifold or timing cover to confirm your engine's original setup. For optimal performance, COMP Cams recommends using headers, a gear ratio between 3.55 and 4.10, and a torque converter with a stall speed of 2000 RPM or higher.

This kit is a significant upgrade for your engine's breathing and valve timing. Remember to consult the included instructions for proper installation, and be aware that this part is not CARB approved and cannot be shipped to California. For 1955-1957 Chevrolet 265 engines, a specific oiling groove on the 5th cam journal is required; please contact us for more details if this applies to your build.