COMP Cams Thumpr 235/249 Retro-Fit Hydraulic Roller Complete Kit For Oldsmobile 260-455

When you're ready to give your Oldsmobile V8 a serious performance upgrade, this COMP Cams Thumpr 235/249 Retro-Fit Hydraulic Roller Complete Kit is what you're looking for. This kit is designed for Oldsmobile 260, 307, 350, 403, 400, 425, and 455 cubic inch engines from 1967 and newer. It's built for a high-performance street or strip application, and you can expect a rough idle that lets everyone know this engine means business.

Inside this comprehensive kit, you'll find everything needed to get your engine running with a new hydraulic roller setup. It includes the camshaft itself, a set of hydraulic roller lifters, valve springs, retainers, valve locks, and valve stem seals. To ensure proper installation and function, the kit also comes with a timing chain set and assembly lube. COMP Cams even includes decals and instructions to guide you through the process.

For this kit to perform at its best, your engine should have at least 9:1 compression. You'll also want to pair it with a performance intake manifold, appropriate gearing, and headers to really unlock its potential. A stall converter of 2500 RPM or higher is recommended to keep the engine in its power band, especially for automatic transmissions. Please note this kit is not CARB approved and cannot be shipped to California.