BTR Brian Tooley Racing LS Rocker Arm Trunbion Kit (TK001) | Fits 4.8L 5.3L 5.7L 6.0L 6.2L LS1 LS2 LS3 LQ4 LM7 LM4 Engines | Upgraded Bearing Trunnion Kit

Upgrade the weak factory rocker arm trunnions in your LS engine with the Brian Tooley Racing BTR Trunnion Kit. Designed to eliminate the common failure points found in OEM needle bearing rocker arms, this kit replaces the factory setup with a durable, captured bearing design built to handle increased RPM, higher valve spring pressures, and aggressive camshaft profiles. Whether you're running a mild cam upgrade or a full performance build, this trunnion upgrade is a must-have for improving valvetrain stability and long-term reliability. The BTR kit delivers smoother operation, better load distribution, and increased durability under demanding conditions, making it ideal for both street and performance applications. Engineered for LS platforms including LS1, LS2, LS3, and popular truck engines like LQ4, LM7, and LM4, this kit is trusted by builders and enthusiasts looking to bulletproof their valvetrain without replacing the entire rocker assembly.

• Eliminates Factory Trunnion Failure Points: Replaces weak OEM needle bearings that are prone to failure with a captured bearing design, preventing loose needles from damaging your engine and significantly improving long-term reliability.
• Captured Bearing Upgrade Design: Features a full captured trunnion system that keeps all internal components securely in place, providing smoother operation and consistent performance under high RPM and heavy valvetrain loads.
• Built for Performance and High RPM Use: Designed to handle increased valve spring pressures and aggressive camshaft profiles, making it ideal for cammed engines, upgraded valvetrains, and performance-focused LS builds.
• Wide LS Engine Compatibility: Fits a broad range of LS engines including 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L platforms such as LS1, LS2, LS3, LQ4, LM7, and LM4, making it a versatile upgrade for both car and truck applications.
• Cost-Effective Valvetrain Upgrade: Allows you to strengthen your factory rocker arms without the expense of full aftermarket rocker assemblies, delivering improved durability and performance at a fraction of the cost.