Michigan Motorsports LS1 Rocker Arms with Upgraded Trunnions | Pre-Assembled for GM LS Engines | Fits 4.8 5.3 5.7 6.0 LS2 LS6 LQ4 LQ9 LY5 LM7 L33 | Enhanced Durability and Performance

Upgrade your GM LS engine’s valvetrain with these pre-assembled Michigan Motorsports LS1 Rocker Arms featuring upgraded trunnions, designed to enhance stability, durability, and performance. This kit provides fully assembled rocker arms with high-performance trunnion bearings, replacing the factory needle bearings for improved strength and reliability. Designed as a direct replacement for LS-based engines, these rocker arms fit 4.8L, 5.3L, 5.7L, 6.0L LS1, LS2, LS6, LQ4, LQ9, LY5, LM7, and L33 applications, making them an ideal upgrade for stock and high-performance builds. The upgraded trunnions enhance valvetrain stability and allow for increased RPM potential, ensuring smoother operation under high-lift camshaft conditions. Built for long-term durability, these rocker arms are precision-machined to OEM specifications, ensuring a perfect fit and reliable performance in LS-powered vehicles. Whether you're rebuilding an engine, upgrading your valvetrain, or replacing worn factory components, these pre-assembled LS1 rocker arms with upgraded trunnions offer a superior solution for strength and longevity. Upgrade your LS valvetrain with a proven high-performance rocker arm solution designed for street, strip, and high-performance applications.