COMP Cams Camshaft CS X4 258HR-11

If you're looking to build a strong-running Chevrolet Small Block engine that still offers decent mileage and works well with stock or mildly modified components, this COMP Cams Xtreme 4x4 camshaft is a solid choice. It's designed for the popular Gen 1 Small Block Chevy engines, providing a noticeable boost in torque without sacrificing drivability. This camshaft is a hydraulic roller type, which means it's built for smoother operation and better longevity compared to older flat tappet designs.

The X4 258HR-11 camshaft features a 206-degree intake duration and a 210-degree exhaust duration, both measured at 0.050 inches of lift. This specific lobe separation angle of 111 degrees helps to create a strong torque curve that starts low in the RPM range, making it ideal for trucks, muscle cars, and street rods where low-end grunt is essential. It's well-suited for engines ranging from the smaller 262ci up to the 400ci displacement, and it works with either stock or slightly upgraded valvetrains. Keep in mind that while this camshaft is designed for many factory roller blocks, it's crucial to verify your specific engine's setup, as some earlier models (especially from 1985 and newer) may have been equipped with flat tappet cams from the factory.

This camshaft fits a wide range of Chevrolet and GM vehicles from the 1980s and early 1990s, including popular models like the Chevrolet C10, Camaro, and Caprice, as well as Buick Roadmasters and AM General Hummers. It's important to note that this camshaft is not CARB approved and cannot be shipped to California. For 1955-1957 Chevrolet 265 engines, a specific oiling groove on the fifth cam journal is required; please contact us for details if your engine falls into this category.