Product Description
CHE 4290 LS / LT Bushing Trunnion Kit for Stock Rocker Arms
Full Engine Set to Upgrade 16 Rocker Arms | Precision CNC-Machined | Made in the USA
The CHE 4290 LS/LT Bushing Trunnion Kit is engineered to deliver maximum reliability, precision, and durability for LS and LT-based GM V8 engines. This complete kit upgrades all 16 factory rocker arms by replacing the failure-prone OEM needle bearings with CHE Precision’s proprietary bushing design. Manufactured in the USA using advanced CNC machining, every component is built to exact tolerances for consistent performance in street, strip, and race applications. Proven through extensive Spintron testing and real-world motorsports use—including NASCAR—this kit eliminates the risk of bearing failure while maintaining proper valvetrain geometry and long-term durability.
Key Features
- Complete 16-Rocker Upgrade: Full engine kit converts all 16 stock rocker arms, replacing OEM needle bearings with CHE’s precision bushing and trunnion system.
- Proprietary Bushing Design: CHE’s industry-leading bushing material delivers exceptional wear resistance and eliminates the risk of loose needle bearings causing catastrophic engine damage.
- Made in the USA: CNC-machined in the United States with unmatched consistency, precision, and quality control standards.
- Track-Tested & Proven: Validated through Spintron testing and professional motorsports environments, including NASCAR, under extreme RPM and load conditions.
- Superior Reliability: Bushing-style design removes small bearing components from the valvetrain, greatly reducing failure risk in performance and high-RPM builds.
What’s Included
- Full Engine Kit: Complete set to upgrade all 16 rocker arms.
- CHE Precision Components: Proprietary bushings and trunnions engineered for long-term durability.
- Required Circlips: Included for secure and proper installation (C-clip tool required).
Key Fitments
- LS & LT GM V8 Engines: Fits 1999-newer LS and LT-based engines using stock rocker arms.
- Supported Engine Codes: LS1, LS2, LS3, LS6, L99, LSA, L92, L9H, L94, 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, L82, LT4, L8T.
- Performance Applications: Ideal for stock, street performance, boosted, and race builds requiring enhanced valvetrain durability and reliability.
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Product Reviews
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A++++
Quality part Customer service A+ Shipping cost A+ Shipping speed A+
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Great product!
Easy install. Clear instructions. Came with a couple extra clips that were definitely needed on my part.
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trunion kit
Best Quality Kit
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Great product
If you are ever inside your LS, go ahead and put these in. Thank me later. Impressive shipping time and service from Michigan Motorsports. Will check here first for any of my LS needs.
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CHE trunion kit
These are super trick trunion kits.
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CHE4290, the best
I used these trunnions once and found myself ordering two more sets. Great performance and the quality of these trunnions is excellent.
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CHE
Absolutely a great product and quality, very easy and simple installation! Would highly recommend this product and brand! You pay for what you get!
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Top Quality product!
Top quality product from CHE. Michigan Motorsports shipped these out to me super fast when they were on backorder everywhere else.
