COMP Cams Camshaft CS XR258HR-10

If you're looking to get more out of your Chevrolet Small Block engine, especially in a street-driven application, this COMP Cams Xtreme Energy camshaft is a solid choice. It's designed to bridge the gap between a mild street cam and a race-only grind, offering a noticeable bump in torque and throttle response without sacrificing too much drivability. This particular grind, the XR258HR-10, is known for delivering strong torque, improved mileage, and a smooth idle, making it a popular option for stock to mildly modified engines.

What sets this camshaft apart is its Xtreme Energy lobe design. These lobes open the valves quicker, which translates to better responsiveness and a more effective lift curve. This improved valve timing helps generate more vacuum, allowing for a slightly longer duration that further enhances performance. COMP Cams has engineered these cams for durability, ensuring they hold up well in daily driven vehicles while keeping valve train operation quiet. For optimal performance, it's recommended to pair this camshaft with COMP Cams roller rockers and matched valve springs, and you'll also want to ensure you have supporting modifications like an upgraded intake manifold and headers.

This camshaft is designed to fit a wide range of Chevrolet Small Block engines, including popular displacements like the 350ci. It's important to verify your engine's configuration, as it's intended for blocks with flat tappet camshafts and does not fit factory roller blocks from 1985 and newer, nor the LS-based engines. When properly installed with supporting components, this camshaft is capable of producing significant torque and horsepower gains, making it a worthwhile upgrade for your build.