COMP Cams Camshaft Kit CS XM 278H-12

If you're looking to get more performance out of your jet boat or offshore performance vessel, this COMP Cams Xtreme Marine Camshaft Kit is designed to give your Chevrolet Small Block Gen 1 engine a serious boost. This kit is built for high-performance applications, offering a rough idle that signals its aggressive nature and a cam profile that works well with A or B impellers.

This isn't just a camshaft; it's a complete package to ensure your engine gets the upgrades it needs for improved performance. Inside this kit, you'll find the CS XM 278H-12 camshaft itself, along with hydraulic lifters, valve springs, retainers, valve locks, and valve stem seals. To make sure your timing is spot on, a new timing chain set is included, and for flat tappet applications, you'll also get assembly lube. This comprehensive approach means you have most of what you need to get your engine breathing better and performing at a higher level.

This kit is specifically designed for Chevrolet Gen 1 Small Block engines, covering a wide range of displacements from 262 to 400 cubic inches. It's important to verify your specific engine setup, as this kit is intended for flat tappet camshafts and does not fit factory roller camshaft engines (typically 1985 and newer, though some trucks and SUVs retained flat tappets longer). It also won't fit LS-based engines. For those with a 1955-1957 Chevrolet 265 engine, a specific oiling groove on the 5th cam journal is required; please contact us for details. This kit is a solid option for those seeking a noticeable increase in power for their marine application.