Motorsports LS Rocker Arm Trunion Upgrade Kit - Fits GM LS Engines

The LS Series retrofit trunion kits are designed to convert stock LS Series rocker arms into captured roller bearing rocker arms. These kits are used on all GM LS style rocker arms, including LS1, LS2, LS3, LS6, L99, LS4, LS7, LS9, LSA, LQ4, LQ9, L76, L92, LR4, LM7, L59, and LM4 engines, ranging from 4.8 to 7.0 liters in displacement.

The factory bearings in LS Engines are a known failure point. When they fail, they can send small bearings through the entire engine, causing further damage. The upgraded trunions in these kits use a captured roller bearing, which provides a reliable and smooth rotation. This increased stability also improves performance at higher RPMs.

These trunion kits are versatile, suitable for use in anything from stock 4.8-liter engines all the way up to high-performance 1,000+ horsepower turbo motors. The kit includes the rocker arm trunions, rocker arm bearings, rocker arm retaining rings, and upgraded bolts for a complete installation.

The bolts supplied with the kit are slightly shorter than the factory bolts, ensuring they do not protrude into the intake ports. These bolts are stronger than a grade 8 bolt, with a minimum tensile strength of 170,000 psi. The installation process is relatively straightforward, requiring the use of a press or a simple vise, along with basic hand tools. Detailed instructions are included to guide the user through the installation process.

In summary, these LS Series retrofit trunion kits provide a reliable and upgraded solution for converting stock LS Series rocker arms into captured roller bearing rocker arms. The improved design and components offer increased stability and performance, making them a suitable choice for a wide range of LS-powered applications, from mild to wild.

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