COMP Cams Camshaft LS1 309Lrx HR-115

If you're building an extreme displacement LS engine for racing and using cathedral port cylinder heads, this COMP Cams camshaft is a solid option. It's specifically ground for applications that demand all-out power, like dedicated race cars or heavily modified street machines. This hydraulic roller camshaft, part number 54-466-11, is designed to work with GM LS Gen III and IV engines, covering displacements from 4.8L up to 7.0L.

The HR-115LSR grind features a 259-degree intake duration and 267-degree exhaust duration at .050 lift, with a 115-degree lobe separation angle. This setup is tuned for maximum power output in larger displacement LS engines, especially those paired with cathedral port heads. COMP Cams is well-known for its camshafts, and this one is built to handle the demands of serious performance builds. Remember that this camshaft is not CARB approved and cannot be shipped to California.

This camshaft fits a wide range of GM vehicles, including models like the Chevrolet Camaro, Cadillac CTS, and Chevrolet Silverado. It's important to ensure your specific engine displacement and cylinder head design are compatible with this grind for optimal performance. For a build like this, you'll also want to consider matching valve springs, pushrods, and potentially other valvetrain components to ensure reliability and performance.