Product Description
GM OEM LS Rocker Arms with Upgraded Trunnions Installed
Set of 16 GM LS Rocker Arms with 8620 Steel Trunnions & Caged Roller Bearings | LS1-Style Allen Head Bolts Included
Upgrade your LS valvetrain with this complete set of GM OEM LS rocker arms featuring upgraded trunnions and caged roller bearings already installed. Each rocker begins as an OEM GM LS rocker arm and is upgraded with an LS1 retrofit trunnion system using 8620 steel alloy trunnions and caged roller bearings. This conversion replaces the factory powdered-metal trunnions and loose needle-bearing arrangement for a more durable, service-ready rocker setup. The kit includes sixteen upgraded rocker arms and sixteen LS1-style Allen head rocker bolts for compatible LS engine builds, cylinder head upgrades, camshaft installations, and valvetrain service.
Key Features & Benefits
- Complete Set of 16 GM OEM Rocker Arms: Includes sixteen OEM GM LS rocker arms, enough to service one compatible V8 engine. Each rocker arrives with the upgraded trunnion assembly already installed.
- 8620 Steel Alloy Trunnion Upgrade: Replaces the factory powdered-metal trunnion with an upgraded 8620 steel alloy trunnion for a more robust rocker arm pivot assembly.
- Caged Roller Bearing Design: Uses caged roller bearings in place of the factory loose needle-bearing configuration, helping reduce the risk associated with loose needle-bearing failure in compatible LS valvetrain applications.
- LS1-Style Allen Head Bolts Included: Includes sixteen upgraded socket head cap screws for installation, providing the required fasteners for compatible cylinder head and rocker arm assembly.
- Ideal for Stock or Modified LS Builds: A practical valvetrain upgrade for stock rebuilds, heads and cam combinations, engine swaps, cylinder head service, and performance LS engine projects.
Kit Includes
- (16) GM OEM LS rocker arms with upgraded roller bearing trunnion kits installed
- (16) Upgraded LS1-style Allen head rocker arm bolts
Specs
- Product Type: Upgraded LS rocker arm assembly set
- Rocker Arm Quantity: Set of 16
- Rocker Arm Base: OEM GM LS rocker arms
- GM Rocker Arm Reference: 112681275
- Trunnion Material: 8620 steel alloy
- Bearing Style: Caged roller bearings
- Installation Hardware: LS1-style Allen head rocker bolts included
Notes
- Installation Orientation: Rotate each trunnion so the flat recessed side of the center hole faces upward. The supplied socket head cap screw must seat against this recessed flat side.
- Torque Specification: Install the supplied socket head cap screws using the OE procedure and tighten to 22 ft-lbs.
- Compatibility Verification: Verify cylinder head, rocker arm style, pushrod length, valve spring clearance, and complete valvetrain geometry before installation.
- Recommended Use: Suitable for compatible stock LS rebuilds, heads and cam installations, cylinder head service, engine swaps, and modified LS engine combinations.
Key Fitments
- LS1, LS2, and LS6 engine applications
- LR4 and LM7 4.8L engine applications
- L59 and L33 5.3L engine applications
- Vortec 5300 engine applications
- Compatible 4.8L, 5.3L, 5.7L, and 6.0L GM LS engine applications
- Fitment note: Verify rocker arm style, cylinder head configuration, and valvetrain compatibility before purchase.
