COMP Cams Camshaft CB XR258HR-10

If you're looking to wake up your Chevrolet Big Block engine, a camshaft upgrade is one of the most effective ways to change its personality. This COMP Cams XR258HR-10 hydraulic roller camshaft is designed for 396 to 454 cubic inch engines that originally came with a flat tappet camshaft. It's a popular choice for those building a street/strip machine that still needs to be manageable on pump gas.

This camshaft features a 206-degree intake and 212-degree exhaust duration at .050 inch lift, with a 108-degree lobe separation angle. These specs are chosen to provide a noticeable improvement in power and torque across the RPM range, especially in the mid-to-upper range, without making the engine too choppy or difficult to control. Being a hydraulic roller design, it offers reduced friction and wear compared to older flat tappet cams, allowing for more aggressive profiles and better performance longevity. It's well-suited for engines originally equipped with flat tappet cams, offering a significant performance boost.

This camshaft fits a wide range of Chevrolet vehicles from the late 1960s through the mid-1970s, including popular models like the Chevelle, Camaro, and Impala. Please note that this camshaft is not CARB approved and cannot be shipped to California. Also, be aware that 1965-1966 396 Big Block engines with an oiling groove in the rear journal require a specific camshaft; if your engine falls into this category, please contact us for assistance.