Product Description
BTR Shaft Rocker Kit – Pre-Assembled with BTR Rocker Bodies
Fits AFR & TFS LS3 Cylinder Heads Only | 1.7 Ratio Drop-In Shaft Rocker System
The BTR Shaft Rocker Kit is engineered to solve the valvetrain deflection issues common with stock pedestal-mounted rockers on Gen III/IV LS heads. Designed specifically for AFR and TFS LS3 cylinder heads, this pre-assembled system delivers dramatically improved stability, strength, and high-RPM control. Featuring billet steel stands, 52100 bearing steel shafts, and all-new 1.7 ratio BTR rocker bodies, this kit is ready to handle serious spring pressure, aggressive cam profiles, and extended abuse on track or street. No more broken rockers—just consistent, reliable power.
Key Features
- Pre-Assembled Shaft System: Complete BTR shaft rocker assembly with billet steel stands, 52100 bearing steel shafts, fasteners, and bearings for a true bolt-on valvetrain upgrade.
- High-Strength Rocker Bodies: All-new 1.7 ratio BTR rocker arm bodies are 46% stronger than stock Chevrolet rockers (FEA analysis), delivering excellent durability under high spring loads.
- Reduced Valvetrain Deflection: Shaft-mounted design with four shafts per head and five fasteners per rocker pair dramatically improves stability versus traditional single-bolt rocker setups.
- V2 Shim Design: Updated Version 2 kit uses a shim-based design for easier assembly and higher strength compared to earlier snap-ring style systems, simplifying service and setup.
- High-RPM Capability: Extended tip design improves valve tip durability, while superior moment of inertia versus roller-tip rockers supports maximum RPM potential in serious performance builds.
Key Fitments
- Engines: LS3-style Gen III/IV LS-based 6.2L performance builds using AFR (Air Flow Research) or TFS (Trick Flow Specialties) LS3 cylinder heads.
- Platforms: GM LS3 performance applications (cars, trucks, and swap projects) equipped with AFR or TFS LS3 cylinder heads requiring a shaft-mounted rocker solution.
- Notes: Fits AFR & TFS LS3 cylinder heads only. Drop-in 1.7 ratio design; ideal for high-spring-pressure, high-RPM, and aggressive camshaft combinations where rocker strength and stability are critical.
