Product Description
Michigan Motorsports LS7 Rocker Arm Upgrade Trunnion Kit
Fits LS7 Engines Only | Captured Roller Bearing Trunnion Upgrade Kit with Bearings, Retaining Rings, Bolts & Installation Washers
Upgrade your factory LS7 rocker arms with the Michigan Motorsports LS7 Rocker Arm Upgrade Trunnion Kit. This LS7-specific retrofit kit is designed to convert stock LS7 rocker arms into a stronger captured roller bearing setup that helps eliminate the weak factory bearing design. OEM LS rocker arms are lightweight and strong, but the factory needle bearings are a known failure point that can send small bearings through the engine if they come apart. This upgraded trunnion kit replaces the factory-style setup with captured roller bearings for smoother rotation, improved valvetrain stability, and increased reliability at higher RPM. Whether your LS7 is stock, cammed, boosted, nitrous-fed, or built for serious performance, this kit is a smart reliability upgrade for protecting your engine and improving rocker arm durability without the cost of high-end aftermarket roller rockers.
Key Features & Benefits
- LS7-Specific Trunnion Upgrade Kit: Designed specifically for LS7 rocker arms, this retrofit kit converts factory LS7 rockers into captured roller bearing rocker arms. It is the correct upgrade for LS7 applications only and is ideal for improving durability while retaining the lightweight strength of the stock rocker arm body.
- Replaces Known Factory Bearing Weak Point: Factory LS rocker bearings are a common failure concern, and when they fail they can send loose needle bearings through the entire engine. This kit replaces that weak point with a captured roller bearing design to help reduce the risk of bearing debris and severe internal engine damage.
- Improves Stability at Higher RPM: The upgraded trunnions and captured roller bearing design provide smoother rotation and more stable rocker arm operation at elevated RPM. This makes the kit highly recommended for LS7 engines with aftermarket camshafts, upgraded valve springs, forced induction, nitrous, or aggressive performance use.
- High-Strength Shorter LS7 Bolts Included: The included upgraded bolts are slightly shorter than factory LS7 bolts so they do not protrude into the intake ports. These bolts are stronger than Grade 8 hardware with a minimum tensile strength of 170,000 psi, giving your upgraded rocker arm setup a stronger, cleaner installation.
- Performance-Proven Michigan Motorsports Upgrade: Michigan Motorsports uses these trunnion kits in everything from stock 4.8L engines to 1,000+ horsepower turbo combinations. For LS7 owners, this kit offers a cost-effective way to make factory rocker arms perform like a much more expensive roller rocker setup.
Kit Includes
- (16) Rocker arm trunnions
- (32) Rocker arm bearings
- (32) Rocker arm retaining rings
- (16) Upgraded shorter LS7 rocker arm bolts
- (2) Washers for pressing bearings
- Installation instructions
Important Installation Notes
- Installation Method: Installation is fairly simple with the use of a press or a vise along with basic hand tools.
- Instructions Included: Instructions are included to help guide the trunnion kit installation process.
- LS7 Bolt Design: Included bolts are shorter than factory LS7 bolts to prevent protrusion into the intake ports.
- Hardware Strength: Supplied bolts are stronger than Grade 8 with a minimum tensile strength of 170,000 psi.
Notes
- Brand: Michigan Motorsports
- Application: LS7 rocker arm trunnion upgrade kit.
- Upgrade Style: Captured roller bearing trunnion conversion for stock LS7 rocker arms.
- Recommended Use: LS7 rocker arm bearing upgrade, valvetrain reliability improvement, aftermarket camshaft installs, supercharger builds, turbo builds, nitrous applications, high-RPM LS7 combinations, and preventive maintenance.
- Other LS Applications: For non-LS7 LS engines, see Michigan Motorsports part number 55100.
- Important Compatibility Note: This kit is for LS7 engines only.
Key Fitments
- LS7 engine applications
- LS7 rocker arm trunnion upgrade applications
- LS7 captured roller bearing rocker arm conversion applications
- Stock LS7 rocker arm upgrade applications
- Aftermarket camshaft LS7 valvetrain applications
- Supercharged, turbocharged, or nitrous LS7 valvetrain applications
- Fitment note: Fits LS7 engines only.
