COMP Cams Camshaft CS 289Tkn-R7 .900Bc

This COMP Cams CS 289Tkn-R7 .900Bc camshaft is a solid roller type, designed for Chevrolet Small Block engines displacing between 383 and 415 cubic inches. It's a popular choice for late model oval track racing applications, especially when paired with a 1.6:1 rocker arm ratio and good cylinder heads, aiming to extract more performance from your engine.

The camshaft features a 261/270 degree duration split, meaning the intake and exhaust valves are open for slightly different durations. This specific grind is optimized for engines that can handle the demands of a solid roller setup, offering improved valve lift and faster valve events compared to hydraulic or flat tappet designs. It's important to note that this camshaft requires a Melanized or Nitrided distributor gear to prevent premature wear and potential warranty issues; cast or steel gears without these surface treatments are not compatible.

This camshaft fits a wide range of Chevrolet GEN 1 Small Block engines, including popular displacements like the 350, 400, and 383 strokers. However, it's crucial to verify your specific engine's configuration. It does not fit factory roller small blocks from 1985 and newer, nor does it fit any LS-based engines. Early 1955-1957 Chevrolet 265 engines require a specific oiling groove on the rear journal, and if your block has this feature, you'll need to contact us for a special order.