GM LS LSR Cam - 269LRHR12

The GM LS LSR Cam - 269LRHR12 is a high-performance hydraulic roller camshaft engineered for LS-platform engine builds that demand serious power output and rpm capability. Built by COMP Cams, a leader in aftermarket valvetrain components, this cam is designed for enthusiasts and mechanics seeking to unlock the full potential of LS powerplants without sacrificing street manners or reliability. Whether you're upgrading a gen III LS2, LS3, or building a dedicated LSR race engine, this camshaft provides the valve event timing and lift characteristics necessary to maximize horsepower and torque across the rpm band.

The 269LRHR12 designation indicates a hydraulic roller design with 269 degrees of advertised duration—a solid mid-range profile that balances aggressive cam action with stable idle quality and streetable operation. Hydraulic roller lifters eliminate the need for adjustable pushrods while delivering precise valve control across the rev range, reducing wear on critical valvetrain components and improving durability under high-load conditions. The roller design minimizes friction compared to flat-tappet alternatives, freeing up parasitic losses and enhancing overall engine efficiency. This cam pairs seamlessly with stock LS cylinder heads or modified heads, and the lift and duration specifications are optimized for applications running boost, nitrous, or naturally aspirated configurations up to approximately 6,500 rpm.

Builders tackling LS swaps into older Chevrolets, Camaros, or specialty platforms will find the 269LRHR12 a versatile upgrade that doesn't require extensive supporting modifications. Installation is straightforward for technicians familiar with LS engine architecture—the camshaft bolts directly into the block, and hydraulic roller lifters handle lash automatically, eliminating valvetrain geometry concerns. Pair this cam with a quality timing set, updated fuel mapping if running EFI, and a performance intake manifold to realize full potential. Real-world results typically yield noticeable mid-range power gains and improved throttle response compared to stock cam profiles, making it an ideal choice for weekend warriors and serious engine builders alike.