COMP Cams Camshaft CB 308A-R10

This is the COMP Cams CB 308A-R10 Magnum solid roller camshaft, designed for Chevrolet Big Block engines like the 396, 427, and 454 cubic inch displacements. It's a popular choice for builders looking to create a serious pro-street machine, typically paired with a 10.5:1 or higher compression ratio, a 3500+ RPM stall torque converter, or a four-speed manual transmission and a 4.10 gear ratio. This camshaft is intended for engines originally equipped with flat tappet camshafts and is not compatible with the 1965-66 396 engines that have an oiling groove in the rear journal.

The CB 308A-R10 features a 262 degrees of intake and exhaust duration at .050 inch lift, making it a potent upgrade for street-driven vehicles that see regular use but are built for aggressive performance. COMP Cams specifies that this camshaft is optimized for use with a Melanized or Nitrided distributor gear. Using cast iron or steel distributor gears without these surface treatments can lead to premature wear and will void the warranty, so it's crucial to select the correct gear to ensure longevity and performance.

This camshaft fits a wide range of Chevrolet vehicles from the late 1960s through the mid-1990s, including popular models like the Chevrolet Impala, Chevelle, and C10 Pickup. When installing this camshaft, ensure you have the appropriate valve springs, retainers, and lifters to match its solid roller design. Always refer to the manufacturer's installation instructions for specific details regarding break-in procedures and compatibility requirements.