Michigan Motorsports LS1 Rocker Arms with Upgraded Trunnions | Pre-Assembled for GM LS Engines | Fits 4.8 5.3 5.7 6.0 LS2 LS6 LQ4 LQ9 LY5 LM7 L33 | Enhanced Durability and Performance









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Features
- Pre-Assembled LS1 Rocker Arms with Upgraded Trunnions: Fully assembled and ready to install, featuring high-performance trunnions for improved durability and smoother operation.
- Enhanced Valvetrain Stability: Upgraded trunnion bearings replace the factory needle bearings, providing greater strength and reduced failure risk under high-performance conditions.
- Direct Fit for GM LS Engines: Designed for 4.8L, 5.3L, 5.7L, 6.0L LS-based engines, including LS1, LS2, LS6, LQ4, LQ9, LY5, LM7, and L33, making them ideal for performance upgrades or OEM replacements.
- Improved High-RPM Performance: Upgraded trunnions allow for increased RPM potential and greater valvetrain control, making them a reliable choice for street, strip, and track applications.
- Designed for Long-Term Durability: Machined to OEM specifications with high-strength materials to withstand aggressive camshafts and high-lift applications, ensuring long-lasting performance.
Manufacturer: Michigan Motorsports
Brand: Michigan Motorsports
Model: LS1 Rocker Arm Kit
Item Weight: 8 pounds
Product Dimensions: 8 x 6 x 2 inches
Item model number: 25100
Is Discontinued By Manufacturer: No
Exterior: Machined
Manufacturer Part Number: 25100
Date First Available: August 20, 2015
Frequently asked questions
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View our full returns policy here.
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