Product Description
Michigan Motorsports LS7 Rocker Arm Upgrade Trunnion Kit
These LS Series retrofit trunnion 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 trunnions use a captured roller bearing allowing for a reliable smooth rotation. The upgraded trunnions also give more stability at higher RPM.
We use these trunnion kits in anything from stock 4.8's all the way up to 1,000+hp turbo motors.
Kit is for LS7 engines only. See Part Number 55100 for other LS applications.
The Kit includes the rocker arm trunnions, 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.
- 16 rocker arm trunnions
- 32 rocker arm bearings
- 32 rocker arm retaining rings.
- 16 upgraded bolts (shorter for LS7's)
- 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.
