COMP Cams Camshaft CS XE256H-12

COMP Cams is well-known for performance valvetrain components, and their CS XE256H-12 camshaft is a popular choice for builders looking to get more out of their classic Chevrolet small block engines. This hydraulic flat tappet camshaft is designed for engines from 1958 through 1998, covering a wide range of displacements from 262 to 400 cubic inches. It's a solid option for those rebuilding or upgrading engines that originally came with a flat tappet valvetrain, offering an improved performance profile over stock.

This particular camshaft features a 212 degrees of intake duration and 218 degrees of exhaust duration at .050 inch lift, with .477 inches of lift on both intake and exhaust. These specifications are chosen to provide a noticeable increase in power and torque, especially in the mid-range, while still being manageable for street use. The XE (Extreme Energy) profile is designed to work well with computer-controlled engines, making it a good fit for many street rods and classic muscle cars that have been updated with modern engine management systems. It's important to confirm your specific engine uses a flat tappet design, as many later model small blocks (1985 and newer) came from the factory with roller camshafts, which are not compatible with this part.

When installing this camshaft, ensure your engine block is compatible. For 1955-1957 Chevrolet 265 engines, a groove on the 5th cam journal is required for proper oiling; contact COMP Cams for details if your engine needs this modification. This camshaft is intended for use in a variety of Chevrolet and GM vehicles, including popular models like the Chevrolet Camaro, Corvette, and C10 trucks, as well as Buick and Cadillac applications from the specified years.