Product Description
Michigan Motorsports LS1 Rocker Arm with Upgraded Trunnions Installed
Direct replacement rocker arm with premium trunnion upgrade for maximum strength and reliability.
The Michigan Motorsports LS1 rocker arm has been upgraded with a professional trunnion installation for unmatched durability in both street and high-performance builds. This rocker arm directly replaces GM part numbers 12681275 and 10214664. Featuring premium 8620 steel alloy trunnions and caged roller bearings, it eliminates the weak factory needle bearings that are prone to failure. Whether your LS engine is stock or a fully built 1,000hp setup, this rocker arm delivers the performance and reliability you need.
Key Benefits
- Direct replacement: Replaces GM part numbers 12681275 and 10214664 for simple fitment.
- Durability upgrade: Premium 8620 steel trunnions and caged roller bearings replace OEM needle bearings.
- Engine protection: Prevents bearing failure that can scatter debris throughout the engine.
- Proven performance: Same rocker arms trusted in Michigan Motorsports’ 1,000hp turbo motor builds.
- Street and race ready: Perfect upgrade for both daily drivers and aggressive heads/cam combinations.
Fitment
Fits LS1, LS2, LS6, LR4, Vortec 5300, LM7, L59, LM4, L33, LQ4, LQ9 – 4.8L / 5.3L / 5.7L / 6.0L engines.
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Product Reviews
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Rocker arms
These rocker arms shipped very fast! Fitment is perfect no damages or defects. 10/10 will buy again and continue to recommend Michigan Motorsports
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Rockers
Exactly as advertised and super fast delivery. These rockers came with new bolts which have an allen head design versus the stock rockers 8mm nut design.
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Ls Rocker Arm
Great upgrade to my rockers
