Product Description
Michigan Motorsports LS Rocker Arm Trunnion Upgrade Kit
Used on all LS style rocker arms including the following: LS1, LS2, LS3, LS6, L99, LS4, LS9, LSA, LQ4, LQ9, L76, L92, LR4, LM7, L59, LM4, L33, L98, L77, LY6, LFA, LZ1, LY2, L20, LMF, LH6, LY5, LMG, LC9, LH8, LS4, 4.8L, 5.3L, 5.7L, 6.0L, 6.2L.
NOTE: LS7 7.0 should order part number 55200
These LS Series retrofit trunion kits are designed to convert stock LS Series rocker arms into captured roller bearing rocker arms. The factory bearings are a known failure on the LS Engines. When they fail they send small bearings through the entire engine. The upgraded trunions use a captured roller bearing allowing for a reliable smooth rotation. The upgraded trunions also give more stability at higher RPM. We use these trunion kits in anything from stock 4.8's all they way up to 1,000+hp turbo motors. The stock factory LS rocker arms are very strong and very light. Once you upgrade the bearings and trunions the rocker arms handle similar to very expensive roller rocker arms (at a fraction of the cost). These are a must have for anyone installing a aftermarket Cam, Supercharger, Turbo or Nitrous. Need multiple sets? Inquire about buying in bulk at a discount.
The kit includes the rocker arm trunions, rocker arm bearings, and rocker arm retaining rings and upgraded bolts for a complete installation. The bolts we supply are slightly shorter than factory bolts so they do not protrude into the intake ports. Bolts are stronger than a grade 8 bolt with a minimum tensile strength of 170,000 psi.
Included in this kit:
- 16 rocker arm trunions
- 32 rocker arm bearings
- 33 rocker arm retaining rings
- 16 upgraded bolts
- 2 washers for pressing bearings
Installation is fairly simple with the use of a press or a simple vise along with basic hand tools. Instructions are included to aid in the installation.
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Product Reviews
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Rocker trunions
Good product
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Trunion upgrade
I've used these before. They have performed and lasted longer than the previous ones I've used
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Excellent quality
Great instructions and quality.
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Outstanding products
I found just what I needed at a reasonable price for namebrand parts no junk parts, and no offbrand all namebrand outstanding
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Trunion bearing kit
Very good quality
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Awesome.
All rockers felt good!
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LS Trunnion kit
These are what is needed. Your trunnions actually fit the stock stands and are stable.
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Trunions
Perfect. Great product, easy to do
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OEM Rocker Arm upgrade.
This was the perfect solution to upgrade the oem rocker arms. That will be used in this 5.3 LS build for or 1986 Camaro.
