GM LS LSR Hyd Roller Cam LS279HV12

The COMP CAMS GM LS LSR Hydraulic Roller Cam LS279HV12 is a high-performance hydraulic roller camshaft engineered for GM LS-series engines seeking aggressive top-end power with manageable street drivability. This cam delivers 0.575-inch intake lift and 0.570-inch exhaust lift across a 279/286-degree duration range with a 112.5-degree lobe separation angle, optimizing power delivery between 2700 and 6500 RPM. Hydraulic roller cam technology eliminates the need for mechanical adjusters while providing precise valve actuation and reduced mechanical wear compared to solid-roller designs.

The LS279HV12 specifications reflect a mid-range duration profile suited for naturally aspirated LS engines where peak horsepower delivery balances street manners with performance gains. The 112.5-degree LSA provides moderate overlap, keeping idle quality manageable while extending the power band higher in the RPM range. Hydraulic roller valve train technology ensures consistent lift characteristics across the entire RPM envelope and reduces valve train noise typical of mechanical systems. This cam pairs effectively with stock or mildly upgraded heads and intake manifolds on LS1, LS2, LS3, and LS9 platforms.

Builders and enthusiasts targeting naturally aspirated LS engine builds—whether for street performance, bracket racing, or weekend track duty—rely on COMP CAMS hydraulic roller profiles to achieve measurable horsepower and torque gains without excessive valve train complexity. The LS279HV12 sits in the performance sweet spot: aggressive enough to justify the cam swap investment, yet compatible with existing oiling systems and stock valve train geometry on most LS applications. Single cam sold individually; matched pairs or full cam packages should be confirmed for your specific block and head combination before installation.