LS7 Shaft Rocker Arm Kit 1.80/1.80 Ratio

The LS7 Shaft Rocker Arm Kit 1.80/1.80 Ratio from T AND D MACHINE represents a critical upgrade for serious LS engine builders targeting high-RPM reliability and consistent valve actuation. Designed specifically for Chevrolet LS7 applications, this rocker arm assembly delivers precise mechanical leverage geometry that translates camshaft motion into optimal valve lift and duration at extreme engine speeds. Whether you're building a dedicated track engine, a competition-grade street machine, or a heavily modified LS platform, this kit addresses the fundamental valve train dynamics that factory components cannot sustain beyond stock operating parameters.

T AND D MACHINE's shaft rocker arm design utilizes a solid, full-length shaft support system rather than individual pedestal stands, providing superior rigidity and resistance to deflection under high valve spring loads. The 1.80/1.80 ratio specification indicates equal rocker arm length on both intake and exhaust sides, delivering consistent valve lift multiplication across both cylinder heads and simplifying cam selection and tune development. This ratio is ideally matched to moderate-to-aggressive cam profiles and allows sustained high-RPM operation without the valve train instability or harmonics associated with inferior stamped-steel rocker designs; the precision-machined construction ensures minimal wear and predictable, repeatable performance across unlimited heat cycles.

LS7 Shaft Rocker Arm Kit 1.80/1.80 Ratio applications range from weekend bracket racers and road course competitors to engine dyno testing and OEM-equivalent race prep. Installation requires proper pushrod length calculation, rocker arm geometry verification, and correct preload setup to prevent valve train noise and ensure full contact at the rocker tip and valve stem. Compatibility extends to all Gen IV LS7 cylinder head configurations, and the kit integrates seamlessly with performance valve springs, high-flow heads, and aggressive hydraulic roller or solid roller camshaft packages. Proper installation by an experienced LS engine specialist is recommended to maximize longevity and unlock full potential in competition or high-output street environments.