The following guide highlights top LS rocker arms with upgraded trunnions, designed to improve durability, valvetrain stability, and performance for GM LS engines. Each option is evaluated for fitment on common LS builds, including 4.8L, 5.3L, 5.7L, and 6.0L variants, with attention to stability at higher RPM and under high-performance conditions. Click through to the product links for full specs and installation notes.
| Product | Brand | Engine Fitment | Notable Benefit |
|---|---|---|---|
| Michigan Motorsports LS1 Rocker Arms with Upgraded Trunnions | Michigan Motorsports | 4.8–6.0L LS-based engines | Enhanced durability with upgraded trunnions |
| BTR V2 Trunnion Kit LS Premium Rocker Arm | Dynosty | LS1/LS2/LS3/LS6 family and variants | Pre-installed inner race bearings; 52100 steel |
| LS1 Rocker Arms with Bolts and Pre-Installed Trunion Kit | Xotic Performance | LS2/LS6 and related LS engines | 16 assembled rockers; improved stability |
| BTR Brian Tooley Racing LS1 Rocker Arms | Michigan Motorsports | 4.8–6.0L LS1/LS2/LS6 family | Extended tip design; higher RPM stability |
| Michigan Motorsports LS Rocker Arm Trunnion Upgrade Kit | Michigan Motorsports | 4.8–7.0L LS family | High-load needle bearings; broad compatibility |
Michigan Motorsports LS1 Rocker Arms With Upgraded Trunnions
These pre-assembled LS1 rocker arms feature upgraded trunnions for improved durability and smoother operation. They are designed to directly fit GM LS engines and replace factory bearings with robust trunnion bearings, reducing failure risk during high-performance use. The kit is compatible with 4.8L, 5.3L, 5.7L, 6.0L engines, including LS1, LS2, LS6, LQ4, LQ9, LY5, LM7, and L33 variants. Installation is straightforward for rebuilds or performance upgrades, with emphasis on reliability under increased lift and RPM.
BTR V2 Trunnion Kit LS Premium Rocker Arm Trunion
The V2 Trunnion Kit from Brian Tooley Racing adds a pre-installed inner race bearing, using 52100 heat-treated steel for increased strength. It covers a broad range of LS platforms (LS1, LS2, LS3, LS6, L99, LS4, LQ4, LQ9, etc.). The upgrade aims to deliver enhanced durability, improved load handling, and better resistance to wear under aggressive cam profiles and high-RPM operation, making it suitable for street to moderate race use.
LS1 Rocker Arms With Bolts And Pre-Installed Trunion Kit
Xotic Performance’s kit includes 16 fully assembled LS1 rocker arms, each upgraded with premium trunnions for a straightforward install and immediate performance benefits. Enhanced valve train stability helps optimize airflow and valve timing, especially in high-performance setups. The design uses high-quality 8620 steel alloy trunnions and caged roller bearings, replacing the factory cageless bearings to improve durability and reduce risk of bearing failure during high RPM and aggressive cam profiles.
BTR Brian Tooley Racing LS1 Rocker Arms With Upgraded Trunnion Kit Installed
These BTR rocker arms are configured for cathedral port LS heads used on a range of LS variants (4.8, 5.3, 5.7, 6.0). The kit includes 16 assembled rockers with an all-new 1.7 ratio drop-in design, offering about 46% stronger performance in FEA analyses and improved tip durability. The kit emphasizes higher RPM stability and is suited for builds that demand reliable operation under elevated lift and load, though compatibility with certain later 6.0L/6.2L variants should be verified before purchase.
Michigan Motorsports LS Rocker Arm Trunnion Upgrade Kit
The Trunnion Upgrade Kit from Michigan Motorsports uses high-strength steel trunnions and needle bearings designed for heavy-duty use. Its broad engine compatibility spans 4.8L to 7.0L LS variants, including LS1, LS2, LS3, LS6, LQ4, LQ9, LR4, and more. The kit aims to reduce valve train wear and trunnion failures at high RPM, making it suitable for aggressive cams and performance-tocused builds while maintaining reliability across a range of LS platforms.
Buying Guide: Key Considerations For Choosing LS Rocker Arm Trunnion Upgrades
- Engine compatibility: Verify exact LS family and generation (LS1, LS2, LS3, LS6, LQ4, LQ9, etc.) to ensure proper fitment and clearance with stock or aftermarket actuators.
- Trunnion material and bearings: Higher-strength materials (such as 52100 steel) and caged roller bearings generally improve durability and reduce wear under high lift and RPM. Consider kits with pre-installed inner race bearings for easier installation.
- Rocker arm ratio and design: Upgrades may feature increased ratios or extended tip designs for higher valve lift and improved tip durability. Ensure your cam profile and valve train clearances can accommodate the changes.
- Installation scope: Some kits are fully assembled and ready to install, while others require component assembly or bolt replacements. Match your skill level and tool availability.
- RPM tolerance and use case: For street use, durability and smoothness may be the priority; for track or turbo builds, focus on stability at higher RPM and load.
- OEM compatibility and clearances: Confirm whether original bolts are reused or supplied; check for compatibility with cathedral port heads if applicable.
- Warranty and support: Review manufacturer warranties and return policies, especially for performance upgrades that alter valvetrain dynamics.
- Cost vs. benefit: Compare the long-term durability and potential performance gains against the price, factoring in labor or installation time.