COMP Cams Camshaft Kit CS XS274S-10

Starting with the 236/242 duration specs on the Xtreme Energy CS XS274S-10 camshaft, this kit is built to give your Chevrolet Small Block Gen 1 engine a serious boost in mid-range torque and throttle response. It’s designed for engines that can handle a more aggressive profile, generally requiring a 2200+ RPM stall speed torque converter to make the most of its powerband. This kit is a comprehensive package, meaning you get everything needed to swap out your old camshaft and related components for a significant performance upgrade.

This COMP Cams kit includes the camshaft itself, a full set of lifters, valve springs, retainers, valve locks, and valve stem seals. You'll also find a timing chain set to ensure your engine's timing is spot-on with the new cam, plus assembly lube to help with installation. It’s a well-built package aimed at enthusiasts looking for that strong pull in the middle of the RPM range, making it ideal for street performance applications where quick acceleration and responsiveness are key. Remember to verify your engine is a flat tappet design, as this kit is not compatible with factory roller camshafts found in many later model Small Blocks.

This kit fits a wide range of Chevrolet Gen 1 Small Block engines, including popular displacements like the 350, 400, and 327. It's a popular choice for vehicles like the Chevrolet Camaro, Corvette, and C10 trucks from the 1980s and early 1990s. While it doesn't fit LT1/LT4 or LS-based engines, it's a direct upgrade for many classic Chevy builds. Always check your specific engine's configuration to confirm compatibility, especially regarding the oiling groove on the 5th journal for 1955-1957 265 engines.