COMP Cams Camshaft LS1 283T HR-109 MT T

If you're looking to significantly boost the performance of your GM LS engine for street and strip use, this COMP Cams Mutha' Thumpr camshaft is a popular choice. This camshaft is designed to work with a wide range of LS displacements, including 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L engines found in vehicles like the Chevrolet Camaro, Corvette, and Silverado trucks. It's a hydraulic roller camshaft, which means it uses roller lifters to reduce friction and allow for more aggressive lobe profiles compared to flat tappet designs.

This particular grind, the 227/241 HR-109, is built for serious performance. It requires a minimum of 9.0:1 compression to perform optimally, and you'll want to pair it with a higher stall speed torque converter (2500 RPM or more), a performance intake manifold, rear end gears, and headers to really unlock its potential. Expect a noticeable, rough idle with this camshaft – it's a sign that it's working hard to deliver improved airflow and power. The hydraulic roller design helps ensure reliable operation and longevity when properly installed and maintained.

When installing this camshaft, remember that it's a significant upgrade and requires supporting modifications to function correctly. Ensure your engine's valvetrain components, like valve springs and pushrods, are compatible with the increased lift and duration. This camshaft is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper setup and break-in procedures.