COMP Cams Camshaft Kit CS 291T HR-7 MT

If you're looking to build a serious street/strip machine with a Chevrolet Small Block Gen 1 engine, this COMP Cams Mutha' Thumpr camshaft kit is designed to get you there. This kit is built around the CS 291T HR-7 MT hydraulic roller camshaft, which is engineered for high-performance applications that demand a rough idle and significant power gains, especially when paired with other supporting modifications. It's a popular choice for those aiming for a noticeable difference in their vehicle's performance profile.

This isn't just a camshaft; it's a complete K-Kit, meaning it includes everything you need to get the job done right. Inside, you'll find the camshaft itself, a set of hydraulic roller lifters, matching valve springs, retainers, valve locks, and valve stem seals. To ensure proper timing and installation, the kit also comes with a timing chain set and assembly lube. This comprehensive approach saves you time and ensures all components are designed to work together seamlessly for optimal performance and reliability. The kit is intended for engines with at least 9:1 compression and benefits greatly from a 2500+ RPM stall torque converter, performance intake, and headers.

This kit fits a wide range of Chevrolet Gen 1 Small Block engines, including popular displacements like the 262 through 400 cubic inches. It's important to verify your engine's configuration, as it does not fit factory roller small blocks from 1985 and newer, nor does it fit any LS-based engines. For 1955-1957 Chevrolet 265 engines, a specific oiling groove on the 5th cam journal is required. Always refer to the included instructions for detailed installation guidance and to confirm fitment for your specific application.