Product Description
Michigan Motorsports LS3 Style Rocker Arms with Upgraded Trunnion Kit & Billet Rocker Stands
Upgrade your LS valvetrain with the Michigan Motorsports LS3 Style Rocker Arms featuring upgraded trunnion bearings professionally installed and billet rocker stands included. Designed for rectangle/square port heads, these rockers deliver durability, improved performance, and long-term reliability for both stock and high-horsepower applications. Combined with precision-machined billet stands, this kit ensures superior rigidity, reduced deflection, and consistent preload settings compared to OEM stamped stands.
Key Features:
- Complete LS3 Upgrade: Includes 16 new LS3 intake rocker arms with offset fulcrum, upgraded trunnion bearings, new bolts, and billet rocker stands.
- Upgraded Trunnion Bearings: Professionally installed caged roller bearings replace weak OEM needle bearings, preventing debris failure and improving durability.
- Billet Rocker Stands: CNC machined from 6061 billet aluminum in the USA, these stands improve rigidity, reduce flex, and ensure consistent lifter preload.
- Precision Tolerances: Rocker heights true within .001" compared to OEM stands that can vary by as much as .015". Replaces GM #12600936.
- Performance Ready: Ideal for aggressive heads and cam combos, proven to withstand high-RPM and high-horsepower applications.
Applications:
Fits LS rectangle/square port heads: LS3, L99, L76, L92, L96, LY6, LSA.
Kit Includes:
- (16) LS3 Series Rocker Arms with upgraded trunnion kit professionally installed
- (16) Upgraded bolts for LS3 rockers
- (2) Michigan Motorsports billet rocker arm stands
