GM LS Thumpr Cam - 283THR

The COMP CAMS GM LS Thumpr Cam 283THR is a hydraulic roller camshaft specifically designed for LS engine platforms that require aggressive street performance and a distinctive engine sound. This camshaft is perfect for automotive enthusiasts looking to enhance the power and responsiveness of stock or mildly modified LS engines, including the LS1, LS2, LS3, and LS9 variants.

Engineered with precision, the 283THR camshaft features aggressive lift and duration profiles that optimize valve overlap and scavenging efficiency, resulting in a pronounced loping idle and improved volumetric efficiency across the RPM range. The hydraulic roller design reduces friction losses compared to flat-tappet alternatives, allowing for precise control of timing events and enhanced combustion efficiency, which translates to better throttle response and fuel economy.

This camshaft is ideal for engine builders and experienced mechanics looking to upgrade naturally aspirated LS platforms with aftermarket intake manifolds, fuel systems, and tuning. With its hardened steel construction and precision-machined lobes, the Thumpr Cam ensures durability and stability, making it a reliable choice for those seeking to maximize their engine's performance.