COMP Cams Camshaft CS XR258HR-12

This is the COMP Cams Xtreme Energy XR258HR-12 hydraulic roller camshaft, designed for computer-controlled Chevrolet 305 and 350 small block engines built from 1987 onward that already have a factory roller camshaft setup. It's a popular choice for those looking to get better fuel economy and a noticeable bump in power without going to an extreme setup. This camshaft is specifically tuned for throttle body injection systems, making it a solid option for improving the performance of your daily driver or weekend cruiser.

The XR258HR-12 features a 206-degree intake and 212-degree exhaust duration at .050 inch lift, with .462 inches of lift on both intake and exhaust. These specifications are carefully chosen to provide a good balance between low-end torque and mid-range power, which translates to improved drivability and responsiveness. Because it's a hydraulic roller camshaft, you'll benefit from reduced friction compared to flat tappet designs, leading to better performance and longevity. It's built for OE roller SBC applications, meaning it's intended to work with the factory lifters and pushrods in eligible engines.

This camshaft fits a wide range of vehicles, including many Chevrolet C/K series trucks, Caprice models, and even some Avanti II cars from the late 80s and early 90s. While it offers improved economy and power, please note that it is not CARB approved and cannot be shipped to California. For installation, ensure you have the necessary tools and refer to the manufacturer's instructions for proper setup to get the most out of this camshaft.