Product Description
Michigan Motorsports LS1 Rocker Arms with Upgraded Trunnion Bearings & GM Support Stands
Professionally upgraded rocker arms with premium trunnion bearings and GM support stands for superior durability and reliability.
Michigan Motorsports LS1 rocker arms have been completely disassembled and rebuilt with upgraded trunnion bearings for long-lasting performance. This kit also includes GM support stands and LS1-style bolts, making it an ideal replacement for factory rockers. Whether your LS motor is stock or built for high horsepower applications, these upgraded rocker arms deliver the reliability, strength, and peace of mind needed for aggressive heads and cam combinations—even proven on our 1,000hp turbo motor.
Key Benefits
- Professionally assembled: LS rocker arms rebuilt with upgraded trunnion bearings—ready for installation.
- Durability upgrade: Premium 8620 steel trunnions and caged roller bearings replace OEM loose needle bearings for superior strength.
- Added stability: Includes genuine GM support stands and LS1-style bolts for secure and precise installation.
- Proven performance: Same rocker arms used in Michigan Motorsports' 1,000hp turbo motor builds.
- Street and race ready: Engineered for both daily drivers and high-performance racing engines.
Fitment
Fits LS1, LS2, LS6, LR4, Vortec 5300, LM7, L59, LM4, L33 – 4.8L / 5.3L / 5.7L / 6.0L engines.
Kit Includes
- (16) LS Series Rocker Arms
- (16) LS-type retrofit trunnions
- (32) LS-type retrofit rocker arm bearings
- (32) LS-type retrofit rocker arm retaining rings
- (16) Bolts for LS trunnion kit
- (2) GM Support Stands
Installation Notes
Install upgraded rocker arms to the cylinder heads using the supplied socket head cap screws. Rotate the trunnion so the flat recessed side of the center hole faces upward (the screw must seat against this surface). Torque to 22 ft-lbs, following the OE installation procedure.
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Product Reviews
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Rocker arms
Great product exactly what was described perfect fit
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Definitely worth the money
Paired these rockers arms up with an stage 2 Drift Cam kit. One of the best combos on the market hands down.
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Awesome products
These rocker arm with trunion bearing upgrade that is pre-built are great. Saved me time not having to install the new trunion bearing kit and saved my motor from the oe rockers that were starting to get loose. The customer service from the sales team has been great as well with their help for my application.
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Great quality
New OE rocker that have a great finish and trunnions installed perfectly. Great to have piece of mind product
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Quality parts
Michigan Motorsports has out done themselves when it comes to GM ls rocker arms. Not only is the product quality top notch but there email an shipping response is one of the best. They have made a new customer for life.
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Rockers with upgraded trunions
So far so good got 600 miles on them
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Rockers w trunnion upgrade
Excellent quality. Well worth it.
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Trunnion upgrade
Very satisfied! High quality parts.
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Rocker arms
looks great, priced right and fast shipping
