COMP Cams Cam & Lifter Kit CB XR308H-R1

If you're working on a Chevrolet Big Block engine, specifically the 396 to 454 cubic inch displacement range, this COMP Cams X-Marine hydraulic roller camshaft and lifter kit is a solid option. It's designed for applications where you need more power and responsiveness, like jet boats with B impellers, or for river drags and bracket racing where 10:1 compression or higher is common. This kit replaces older flat tappet camshafts with a more efficient hydraulic roller setup, which generally means less friction and better performance over time.

This kit comes with everything you need to get started: the camshaft itself, a set of hydraulic roller lifters, assembly lube to ensure proper break-in, and decals. The XR308H-R1 camshaft profile is tuned for strong mid-range power and good top-end pull, making it suitable for vehicles that see a lot of use or are built for competition. The hydraulic roller design is a significant upgrade from traditional flat tappet systems, reducing wear and allowing for more aggressive cam profiles without the same valvetrain stress.

When installing this kit, remember that it's intended for engines originally equipped with flat tappet camshafts. You'll want to follow the included instructions carefully, especially regarding the assembly lube and initial break-in procedure to ensure the longevity of your new valvetrain. This kit is a comprehensive solution for anyone looking to significantly enhance the performance of their classic Chevrolet Big Block.