Product Description
Michigan Motorsports LS7 Bronze Bushing Trunnion Upgrade Kit
Fits LS7 7.0L 427 OEM Rocker Arms | Bronze Bushing Trunnion Kit with LS7-Specific Bolts, Bushings, Circlips & Installation Washers
Upgrade the valvetrain in your LS7 with this LS7 Bronze Bushing Trunnion Upgrade Kit. Designed specifically for LS7 7.0L 427 rocker arm applications, this kit replaces the weak factory needle bearing trunnion setup with micro-polished hardened shafts and C932 bearing bronze bushings for improved lubrication, wider load distribution, and long-term valvetrain reliability. Factory LS rocker bearings are a known failure point, and when they come apart, loose bearing debris can travel through the engine and cause serious internal damage. This bushing-style trunnion upgrade eliminates the small loose needle bearing design, keeps the rocker arm lubricated through dedicated oil channels, and provides a strong reliability upgrade for stock LS7 engines, heads-and-cam combinations, high-RPM builds, and performance 427 applications.
Key Features & Benefits
- LS7-Specific Bushing Trunnion Upgrade: Designed for LS7 7.0L 427 rocker arm applications, this kit upgrades the factory trunnion and bearing setup with a bronze bushing design. It is a strong valvetrain reliability upgrade for LS7 owners looking to improve durability while retaining OEM rocker arm fitment.
- C932 Bearing Bronze Bushings: The kit uses C932 bearing bronze bushings paired with micro-polished hardened shafts for smooth operation and long service life. This bushing material is designed to handle high valvetrain loads while maintaining excellent lubrication under demanding LS7 engine conditions.
- Eliminates Loose Needle Bearing Failure Risk: The factory-style needle bearing design can fail and release small bearing debris into the engine. This bronze bushing trunnion kit removes that failure-prone loose bearing setup, helping protect the oiling system, bearings, and internal components from debris-related damage.
- Improved Lubrication with Oil Channels: Oil grooves at two locations on the trunnion continuously feed oil to the bushing surface. This design helps keep the rocker arm lubricated, reduces wear, and supports smooth operation in stock, cammed, and high-performance LS7 valvetrain applications.
- Wider Load Distribution for Strength: The larger bushing contact area spreads valvetrain load over a wider surface than a needle bearing trunnion. This makes the setup less prone to failure and helps support aggressive camshafts, upgraded springs, higher RPM use, and serious LS7 performance combinations.
Kit Includes
- (16) Rocker arm trunnions
- (32) C932 bronze bushings
- (32) Circlips
- (16) LS7-specific rocker arm bolts
- (2) Installation washers
Notes
- Application: Replacement bronze bushing trunnion kit for LS7 rocker arms.
- Engine Platform: LS7 7.0L 427 applications.
- Trunnion Style: Micro-polished hardened shafts with C932 bearing bronze bushings.
- Lubrication Design: Oil channels feed lubrication to the bushing surface at two locations on the trunnion.
- Hardware: Includes LS7-specific bolts for proper LS7 rocker arm installation.
- Recommended Use: LS7 rocker arm upgrades, valvetrain reliability improvements, camshaft swaps, valve spring upgrades, high-RPM LS7 builds, heads-and-cam combinations, and preventive maintenance.
Key Fitments
- LS7 7.0L engine applications
- LS7 427 engine applications
- LS7 OEM rocker arm applications
- Corvette Z06 LS7 rocker arm upgrade applications
- Camaro Z/28 LS7 rocker arm upgrade applications
- LS7 bronze bushing trunnion conversion applications
- Fitment note: Fits LS7 rocker arm applications only.
