Product Description
Michigan Motorsports LS1 Rocker Arms with Upgraded Trunnion Bearings Professionally Installed & GM Support Stands
Fits: LS1/LS2/LS6/ LR4 Vortec 5300 LM7 L59 LM4 L33 4.8/5.3/5.7/6.0/ Engines
LS Rocker Arms have been disassembled, and new Trunnion Bearings have been professionally installed.
New LS1 style bolts and support stands are included for installation.
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 tenancy 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 install new LS1 rocker arm retrofit trunnion kit that replaces the cageless, loose OEM needle bearings and powdered metal trunion with a premium 8620 steel alloy trunion 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.
This kit includes:
- 16 LS Series Rocker Arms
- 16 rocker arm trunnions- LS-type retrofit
- 32 rocker arm bearings- LS-type retrofit
- 32 rocker arm retaining rings- LS-type retrofit
- 16 bolts for LS trunnion kit
- 2 GM Support Stands
Install the upgraded rocker arms to the cylinder heads using the new socket head cap screws supplied. Be sure to rotate the trunnion so that the flat recess side of the trunnion's center hole faces upward (the socket head cap screw must seat against this recessed flat side of the hole). Tighten the cap screw to a value of 22 ft-lbs. following the OE installation procedure.
