LS1/LS6 Xtreme RPM Hyd. Roller Cam XR259H

The LS1/LS6 Xtreme RPM Hyd. Roller Cam XR259H by COMP CAMS is a purpose-built hydraulic roller camshaft designed for GM LS-series engines seeking maximum RPM capability and street-to-strip versatility. This camshaft transforms naturally aspirated LS powerplants by optimizing valve timing and lift geometry to unlock horsepower gains across a broad RPM band. Built for enthusiasts and performance builders who demand reliability without sacrificing aggressive cam profiles, the XR259H delivers the aggression of a solid roller with the convenience and cost-effectiveness of hydraulic roller technology.

This cam features 0.515-inch intake lift and 0.522-inch exhaust lift, with dual durations of 259 degrees intake and 265 degrees exhaust, optimized around a 112-degree lobe separation angle for excellent mid-range torque and upper-RPM power delivery. The hydraulic roller design eliminates the need for expensive lifter upgrades while maintaining tight valve control and repeatability from idle through the 5,800 RPM peak operating range. Xtreme RPM technology combines advanced lobe profiling and roller geometry to reduce friction, improve flow efficiency, and extend component lifespan—all critical factors in high-stress LS applications where reliability matches performance ambition.

This camshaft is ideal for LS1 and LS6 equipped vehicles—including fifth-generation Camaros, Corvettes, and truck platforms—where owners seek a bolt-on upgrade requiring minimal machine work. Installation pairs seamlessly with stock LS cylinder heads and standard pushrods, making it an accessible choice for street machines, weekend track cars, and mild-to-moderate boost applications. Proper valve spring selection and pushrods rated for the lift specifications are essential; consult COMP CAMS specifications or a qualified LS engine builder to ensure compatibility with your exact combination.