Shaft Mount R/A System - GM LS1/LS2/LS6 1.7 Ratio

The Shaft Mount R/A System - GM LS1/LS2/LS6 1.7 Ratio from PRW Industries represents a precision rocker arm assembly engineered for serious LS-engine builders and performance enthusiasts. This shaft-mount rocker arm kit is designed to maximize valve control, reduce parasitic losses, and deliver consistent performance across high-RPM applications. Whether you're building a street stroker, dedicated track engine, or competition powerplant, this system provides the structural rigidity and mechanical advantage necessary for reliable, repeatable valve train dynamics.

The 1.7 ratio rocker arm geometry increases valve lift by 70 percent compared to the cam lobe, translating to deeper valve opening and improved cylinder filling—critical for maximizing volumetric efficiency and fuel atomization. PRW's Platinum Pro Series construction utilizes full roller bearing design, which substantially reduces friction at the pushrod interface and minimizes wear over extended use. The aluminum construction with clear anodized finish balances durability with lightweight performance, reducing rotating mass while maintaining structural integrity under high spring pressures and aggressive valve train speeds. The shaft-mount design centralizes all rocker arms on a single precision-ground shaft, ensuring synchronized valve timing across all cylinders and eliminating individual rocker arm deflection that can compromise combustion consistency.

This rocker arm system is purpose-built for GM LS1, LS2, and LS6 engines—platforms favored in street performance, road racing, and drag racing applications. Installation requires proper pushrod length verification and valve lash adjustment to ensure optimal performance and component longevity. The kit arrives complete and ready for installation, making it an efficient choice for engine builders prioritizing reliability and repeatability. Competitive builders and restoration specialists routinely specify PRW Industries rocker arms for their proven track record of durability under demanding conditions.