COMP Cams Camshaft Kit CB XR270H-R12

If you're looking to wake up your Chevrolet Big Block engine, this COMP Cams camshaft kit is a solid option. It's specifically designed for the 396 to 454 cubic inch engines that originally came with flat tappet camshafts, and it's a popular choice for inboard/outboard pleasure boats where a good idle is important. This kit helps improve your engine's performance by changing the valve timing and lift, giving you more power and a better throttle response.

This is a complete kit, so you get everything you need to get the job done. Inside the box, you'll find the camshaft itself, a set of hydraulic roller lifters, a new timing chain set to ensure your timing is spot on, and assembly lube to help with the installation. COMP Cams is well-known for making solid engine components, and this kit is built to last. The XR270H-R12 camshaft has a 218-degree intake and 224-degree exhaust duration at .050 lift, with .495 lift on both intake and exhaust when used with 1.7 ratio rockers, which is a nice bump over stock for improved breathing without sacrificing too much drivability.

When installing this kit, remember that it's designed to replace your original flat tappet camshaft with a hydraulic roller setup. This means you'll need to ensure all the components are properly lubricated with the included assembly lube and that the timing chain is installed correctly. This kit fits a wide range of Chevrolet vehicles from the late 60s through the 90s, including popular models like the C10 Pickup, Impala, and Camaro, as well as many boat applications.