COMP Cams Camshaft CS XS256S-10

This COMP Cams Xtreme Energy camshaft features a 218-degree intake and 224-degree exhaust duration with a .477-inch intake and .480-inch exhaust lift. This specific grind is designed to provide strong torque through the low and mid-range of your engine's RPM band, offering a noticeable improvement in responsiveness. It's built to increase performance gains in both torque and horsepower while maintaining adequate vacuum for accessories like power brakes, making it a solid option for carbureted applications or when paired with aftermarket intake manifolds, headers, and free-flowing exhaust systems.

The Xtreme Energy series is known for its quicker valve opening and increased area under the lift curve compared to older camshaft designs. This translates to better performance without making the engine difficult to drive on the street. While it works well in many carbureted setups, you'll see the best results when combined with other performance upgrades. This camshaft fits a wide range of Chevrolet GEN 1 Small Block engines, including popular displacements like the 350, 305, and 400, but it's important to verify your specific engine uses a flat tappet design, as factory roller cams were phased in starting in the mid-80s.