COMP Cams Camshaft CS XM 270HR-12

COMP Cams is well-known for making performance engine parts, and their Xtreme Marine camshafts are built to get the most out of your engine, especially in marine applications. This CS XM 270HR-12 camshaft, part number 12-417-8, is designed to maximize torque, acceleration, and throttle response while also providing excellent high RPM horsepower. It fits a wide range of Chevrolet Small Block engines from 1958 to 2002, including popular models like the Camaro, Corvette, and many C/K series trucks.

This camshaft features advanced intake valve opening ramps that increase engine vacuum and improve throttle response. The special intake closing ramps help close the valve sooner, which builds more cylinder pressure and torque without creating excessive valve train noise. The faster ramps also achieve maximum velocity sooner, increasing the area under the lift curve for maximum horsepower. COMP Cams uses CRC (Constant Radius of Curvature) Technology in these aggressive hydraulic roller designs to ensure durability.

It's important to note that this camshaft is optimized for use with a Melanized or Nitrided distributor gear. Using cast or steel gears without similar surface treatments will void the warranty. If you're rebuilding a classic Chevy Small Block, especially for marine use, this camshaft offers a significant improvement in performance across the RPM range.