Product Description
Michigan Motorsports LS1 Rocker Arm with Upgraded Trunnions Installed
Replaces 12681275 10214664
Fits the following applications: LS1/LS2/LS6/ LR4 Vortec 5300 LM7 L59 LM4 L33 LQ4 LQ9 – 4.8/5.3/5.7/6.0/ Engines
Whether you have a stock LS motor or a highly modified LS motor, replacing your rockers with a true roller bearing setup is highly recommended. The stock bearings have a tendency to fail. These rocker arms are a must-have for any aggressive heads and cam combo and are the same rockers we utilize on our 1,000 hp Turbo Motor. We utilize LS rocker arms and installed a new LS1 rocker arm retrofit trunnion kit that replaces the cageless, loose OEM needle bearings and powdered metal trunnion with a premium 8620 steel alloy trunnion and caged roller bearings for added durability. The caged roller bearings that greatly reduce the possibility of the bearing failure experienced with stock LS1 needle bearings, which can send loose needles throughout the engine upon failure.
