COMP Cams Camshaft Kit OL XR288HR-10

When you're looking to get more performance out of your Oldsmobile V8, this COMP Cams Xtreme Energy K-Kit is a comprehensive package. What you get in this box is a complete setup: the XR288HR-10 hydraulic roller camshaft itself, a set of lifters, the correct valve springs, retainers, valve locks, and valve stem seals. It also includes a timing chain set to ensure your valvetrain stays synchronized, plus assembly lube and decals. This kit is designed for Oldsmobile 260 through 455 cubic inch V8 engines from 1967 and newer.

This XR288HR-10 camshaft is part of COMP Cams' Xtreme Energy line, known for making a noticeable difference in power. It's a hydraulic roller camshaft, which generally means less friction and more efficient operation compared to flat tappet designs. The specs for this particular grind suggest it's built for aggressive performance, calling for a torque converter with at least a 2,800 RPM stall speed, lower gear ratios in the rear end, and a compression ratio around 9.5:1. You should expect a rougher idle with this cam, which is typical for performance grinds that prioritize top-end power. The kit comes with everything needed for installation, including instructions, so you can get your engine rebuilt with confidence.