COMP Cams Cam & Lifter Kit CS XR252HR-1

If you're looking to wake up a classic Chevrolet Small Block engine, this COMP Cams Xtreme Energy CS XR252HR-1 hydraulic roller cam and lifter kit is a solid choice. This kit is designed for Chevrolet Gen 1 Small Blocks, covering a wide range of displacements from 262 up to 400 cubic inches, and fits many popular vehicles like the Chevrolet C10, Camaro, and Caprice. It's important to note that this kit is for engines originally equipped with a flat tappet camshaft; it does not fit factory roller blocks from 1985 and newer, or any LS-based engines.

The XR252HR-1 camshaft features a 200-degree intake and 206-degree exhaust duration at .050 lift, with a .477 intake and .480 exhaust lift. This profile is well-suited for street performance applications, offering a noticeable improvement in throttle response and power band without being overly aggressive for daily driving. The kit includes the camshaft, hydraulic roller lifters, assembly lube, and decals, providing the essential components for a comprehensive upgrade. Installing a hydraulic roller setup can offer better performance and durability compared to older flat tappet designs.

When considering this kit, it's crucial to verify your engine's original camshaft type. Many engines from the mid-80s onward gradually transitioned to roller camshafts, so checking your intake manifold or timing cover is recommended. For 1955-1957 Chevrolet 265 engines, ensure there's a groove on the 5th cam journal for proper oiling; COMP Cams can provide more information on this specific requirement. This kit is not CARB approved and cannot be shipped to California.