Rocker Arm Trunnion Kit LS7 w/1.8 Ratio Rockers

The Rocker Arm Trunnion Kit LS7 w/1.8 Ratio Rockers is a precision-engineered valvetrain upgrade designed for serious LS engine builders and performance enthusiasts pushing their Gen IV powerplants to the limit. Built by Straub Technologies, this kit addresses a critical need for maintaining reliable valve actuation under extreme rpm and boost conditions.

The 1.8 ratio rockers provide the mechanical advantage required to maximize valve lift while keeping pushrod angles in the optimal operating window. This kit features a complete trunnion assembly that replaces the stock pivot point, delivering tighter tolerances and reduced deflection during aggressive valve events. The 1.8:1 rocker ratio increases effective valve lift by approximately 20 percent compared to stock 1.5:1 geometry, enabling better cylinder head flow and improved combustion efficiency.

Buyers upgrading LS7 engines—whether naturally aspirated or forced induction—will benefit from this kit's design, which maintains proper rocker arm geometry across the full valve lift spectrum, preventing binding and minimizing side loading on pushrods. The assembly adds minimal weight while delivering maximum valvetrain stability and component longevity.