Product Description
Michigan Motorsports LS and LT Rocker Arm Bushing Trunnion Kit
Includes 16 Trunnions, 32 Bronze Bushings and 32 Circlips
Upgrade the factory rocker arms in a supported GM LS or LT engine with this Michigan Motorsports bushing trunnion kit. Designed to replace the original needle-bearing trunnion assemblies, the kit combines micro-polished hardened shafts with C932 bearing-bronze bushings for improved lubrication, broader load distribution and increased durability.
The solid-bushing design eliminates the small loose needle bearings that can enter the engine if a conventional trunnion bearing fails. Integrated oil channels positioned at two locations direct oil to the bushing surfaces, helping maintain consistent lubrication throughout rocker-arm operation.
Key Features & Benefits
- Complete 16-Rocker Trunnion Kit: Includes 16 trunnions, 32 C932 bronze bushings and 32 retaining circlips. The supplied quantities provide the internal components needed to convert all 16 factory rocker arms in one supported GM LS or LT engine.
- Micro-Polished Hardened Trunnions: Each hardened trunnion shaft features a micro-polished surface designed to operate with the corresponding bronze bushings. This combination supports smooth rocker-arm movement while providing the shaft strength required for valvetrain operation.
- C932 Bearing-Bronze Bushings: Uses C932 bearing bronze to create a broad supporting surface between each rocker arm and trunnion. The increased contact area distributes operating loads across the bushing instead of concentrating them on individual needle bearings.
- Needle-Bearing-Free Design: Replaces the factory-style needle-bearing arrangement with solid bronze bushings. Removing the small loose needle bearings eliminates components that could be released into the engine if a conventional needle-bearing trunnion assembly fails.
- Integrated Oil Channels: Oil grooves positioned at two locations help direct lubrication to the bronze bushing surfaces. Consistent oil delivery supports smooth movement, improved load handling and the long-term durability of the trunnion and bushing assembly.
Key Fitments:
- LS1 LS2 LS3 LS6 L99 LSA L92 L9H L94 LS2 L76 L77 LY6 L96 LFA LZ1 LY5 LMG LMF LH6 LC9 LY2 L20 L33 LQ4 LQ9 LR4 LM7 L59 LS4 LH8 LH9 LT1 L83 L86 L84 L87 L8B
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Product Reviews
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Trunnion upgrade kit
Old ones were easy to get out without special tools, literally used 2 sockets and hammer, arbor press would of made quick work. The new bronze ones went in easy with a bit of clean oil. Would definitely recommend, good price aslo.
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Trunnions
Great purchase.
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Rocker arm upgrade kit.
Very nice upgrade, perfect fit.
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Great Trunnion Upgrade!
Very happy with the bronze bushing trunnion upgrade. Make sure to use assembly lube when installing to help ease the installation and save time down the road!
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Everything came nice n pack
The only thing is not a big thing but wish you guys would put some free stickers like the logo
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Trunnion kit
Initially order incorrect part Michigan was able to receive old part an send out correct part, very satisfied
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LS Bronze Bushing Trunion Upgrade
Very fast shipping, the trunion kit came neatly packed in a box with plastic organization tray to ensure there is no damage to any of the components. Installation was easy and the product performs without issues.
