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Michigan Motorsports LS1 Rocker Arms with Upgraded Trunnions Installed - Set of 8 - Fits 4.8L 5.3L 5.7L 6.0L LS1 LS2 LS6 LQ4 LQ9 LM7 - GM Replacement #12681275

4.8 (1) Write Review
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$99.99

$ 42 .99 $42.99

In Stock
  • High-Quality Construction – Manufactured from premium materials to ensure durability and longevity, these rocker arms are designed to withstand the rigors of high-performance applications.​
  • Precision Engineering – Each rocker arm is engineered to meet or exceed OEM specifications, providing reliable performance and maintaining proper valvetrain geometry.​
  • Direct Replacement – Designed as a direct replacement for stock rocker arms in GM LS1, LS2, and LS6 engines, facilitating a straightforward installation process.​
  • Ideal for Performance Upgrades – Perfect for enthusiasts looking to enhance their engine's valvetrain stability and performance, especially in modified or high-RPM applications.​
  • Set of 8 Rocker Arms – This package includes a set of 8 rocker arms, suitable for applications requiring half a set or for replacing a specific bank of rocker arms.​


Product Description

Michigan Motorsports LS1 Rocker Arm Kit w/ Upgraded Trunnions Installed

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

Take your LS1 engine's performance to the next level with Michigan Motorsports LS1 Rocker Arms. Designed for enhanced durability, precision, and reliability, these rocker arms are the ultimate solution for cam swaps, engine rebuilds, and high-performance upgrades.

Save your LS Engine!

LS1 Rocker Arms w/ Upgraded Trunnion Installed

LS1 Rocker Arm w/ Upgraded Trunnions Installed

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 caged roller bearings greatly reduce the possibility of the bearing failure experienced with stock LS1 needle bearings.

Stock LS1 Rocker Arm

LS1 Rocker Arm w/ Stock Trunnions

The stock bearings have a tenancy to fail. The caged roller bearings greatly reduce the possibility of the bearing failure experienced with stock LS1 needle bearings, which can send loose needles throughout the engine upon failure.

Technical Specifications

Material Hardened Steel with Premium Alloy Construction
Bearing Type Upgraded Trunnion Bearings with Captured Needle Rollers
Applications LS1, LS6, and compatible GM LS Engines
Performance Features High-RPM durability, reduced friction, and enhanced valve train stability

  • YES! Michigan Motorsports LS1 Rocker Arms are specifically designed to handle aggressive camshaft profiles and high-performance cam swaps.

  • These rocker arms are compatible with LS1, LS6, and other GM LS-based engines. Will not fit Rectangle Port/"LS3" Style Heads

  • Absolutely! These rocker arms feature upgraded trunnions with heavy-duty captured needle bearings for improved performance and durability.

Michigan Motorsports Logo & LS/LT Performance Parts Specialist

Hundreds of 5-Star Reviews!

-Verified Buyer

"Michigan Motorsports LS1 Rocker Arms were the perfect addition to my cam swap project. The upgraded trunnions give me peace of mind at high RPMs. Highly Recommend!"


Therman Love
Reviewed in the United States on August 26, 2020
They look great works great ,they're used on my drag car so far i'm very happy.
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