Product Description
Michigan Motorsports LS Rocker Arms Bushing Trunnion Kit
Fits OEM LS Rocker Arms | 4.8L 5.3L 5.7L 6.0L 6.2L LS1 LS2 LS3 LS6 LSX LQ4 LQ9 Applications
Upgrade your factory LS rocker arms with the Michigan Motorsports LS Rocker Arms Bushing Trunnion Kit. Designed to fit OEM LS rocker arms, this bushing-style trunnion upgrade replaces the weak factory needle bearing setup with micro-polished hardened shafts and C932 bearing bronze bushings for improved strength, lubrication, and long-term durability. Factory LS rocker arm bearings are a known failure point, and when they fail, loose needle bearings can travel through the engine and cause serious damage. This Michigan Motorsports bushing trunnion kit eliminates those loose needle bearing components, spreads valvetrain load over a wider surface area, and keeps the rocker arm lubricated through dedicated oil channels. Whether you are refreshing a stock LS engine, installing a camshaft, upgrading valve springs, or building a performance LS combination, this kit is a strong reliability upgrade for OEM LS rocker arms.
Key Features & Benefits
- Bushing Style LS Trunnion Upgrade: Designed to upgrade OEM LS rocker arms with a bushing-style trunnion system that replaces the factory needle bearing setup. This gives LS owners a stronger, more reliable rocker arm upgrade while keeping the lightweight and durable factory rocker arm body.
- C932 Bearing Bronze Bushings: The kit uses special C932 bronze bushing material designed for superior lubrication and maximum load capability. Oil grooves at two locations on the trunnion constantly feed oil to the bushing surface, helping reduce wear and support long service life in demanding LS valvetrain applications.
- No Loose Needle Bearings: Unlike factory-style needle bearing designs, this bushing trunnion kit removes the small loose bearing components that can come apart and damage the engine. Eliminating loose needle bearing debris helps protect internal engine parts, oil passages, bearings, and other critical components.
- Wider Load Distribution: The greater surface area of the bushed trunnion spreads valvetrain load over a wider area than a needle bearing trunnion. This design is less prone to failure and helps support higher spring pressure, camshaft upgrades, increased RPM, and more aggressive LS performance combinations.
- Complete Installation Kit: Includes 16 trunnions, 32 bushings, 32 circlips, 16 LS bolts, and 2 installation washers for a complete rocker arm upgrade. This gives builders the core components needed to upgrade a full set of OEM LS rocker arms with a durable bushing-style trunnion system.
Kit Includes
- (16) Rocker arm trunnions
- (32) C932 bronze bushings
- (32) Circlips
- (16) LS rocker arm bolts
- (2) Installation washers
Notes
- Brand: Michigan Motorsports
- Application: Replacement bushing trunnion kit for OEM LS rocker arms.
- Trunnion Style: Micro-polished hardened shafts with C932 bearing bronze bushings.
- Lubrication Design: Oil channels feed lubrication to the bushing surface at two locations on the trunnion.
- Rocker Arm Compatibility: Fits OEM LS rocker arms.
- Recommended Use: LS rocker arm upgrades, valvetrain reliability improvements, camshaft swaps, valve spring upgrades, high-RPM LS builds, power-adder combinations, and preventive maintenance.
Key Fitments
- OEM LS rocker arm applications
- LS1 rocker arm applications
- LS2 rocker arm applications
- LS3 rocker arm applications
- LS6 rocker arm applications
- LSX rocker arm applications
- LQ4 rocker arm applications
- LQ9 rocker arm applications
- 4.8L LS-based engine applications
- 5.3L LS-based engine applications
- 5.7L LS-based engine applications
- 6.0L LS-based engine applications
- 6.2L LS-based engine applications
- Fitment note: Verify OEM LS rocker arm compatibility before purchase.
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Product Reviews
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Great product.
Great product
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Bronze bushings
Great little kit. Solves the needle bearing issue. reliability!
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2 easy 2 install
I used ARP ultra lube as lube and all is well in paradise once again.
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Good Product
Seems good quality. Everything fit very well in the rockers and even came with extra snap rings cause you know they like to go flying every once in a while!
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Great product!
These seem to be a great value offering, and much nicer than the needle bearing offerings. Installation was pretty easy, I haven't gotten a chance to run the car with them yet.
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LS1 rocker arm bronze bushings
Very quality kit, pressed in extremely well - no imperfections found. Can't wait to see how they hold up! Used the Comp Cams upgraded needle bearing kit, I like this much better. Will by again for the next engine I build for sure.
