COMP Cams Camshaft CS 305H-10

If you're building a pro street or bracket racing machine based on a classic Small Block Chevrolet engine, this COMP Cams CS 305H-10 camshaft is a solid option. It's designed for engines ranging from 262 to 400 cubic inches that use a flat tappet valvetrain, and it's a popular choice for those looking for a more aggressive idle and improved performance for limited street driving.

This camshaft features a 253-degree intake and 253-degree exhaust duration at .050 lift, making it a strong performer for applications that also include upgraded intake manifolds, headers, and a torque converter with a stall speed of 3500 RPM or higher. It works well with a compression ratio around 10.5:1, which is achievable with many common engine builds. COMP Cams is well-known for producing reliable camshafts, and this one is built to handle the demands of performance street and strip use.

Keep in mind that this camshaft is intended for engines with a flat tappet valvetrain. If your engine was built from 1985 or later, it's important to verify whether it has a factory roller camshaft, as this one will not be compatible. Many trucks and SUVs retained flat tappet cams into the mid-90s, while performance cars like Camaros and Corvettes received rollers earlier. Removing the intake manifold or timing cover is the best way to confirm your engine's setup.