BTR Brian Tooley Racing LS1 Shaft Rocker Kit Pre-Assembled | Fits 4.8L 5.3L 5.7L 6.0L LS1 LQ4 LQ9 LM7 L33 LS2 LS6 | Cathedral Port Rocker Upgrade

Brian Tooley Assembled LS1 Shaft Rocker Kit V2 Pre-Assembled with BTR Rocker Bodies Fits 1997-2013 Cathedral Port LS Heads 4.8L 5.3L 5.7L 6.0L LS1 LS2 LM7 L33 LQ4 LQ9 Compatible with OEM Casting #'s 243, 241, 799, 853, 706, 862, 317 Fits Trick Flow Cathedral port heads. May fit other heads, please verify first. Performance-minded engine builders know there is an inherent issue with valve train deflection when using stock rocker arm mounting in Chevrolet Gen III-IV-cylinder heads. The BTR shaft rocker system significantly reduces that deflection thereby improving performance and durability. This kit features technology typically only found in high-end shaft rocker systems. The shaft rocker system consists of a billet steel stand equipped with four shafts per cylinder head, fasteners and bearings. The shafts are made from genuine 52100 bearing steel. Each pair of rockers has five fasteners mounting them to the rocker stand compared to the traditional single bolt per rocker configuration. During the development of this system, both aluminum and steel stands were tested - steel reigned supreme. The new BTR shaft rocker kit is ready for installation, already pre-assembled with high strength BTR rocker arm bodies. This updated V2 version of the shaft rocker kit features a shim design for easier assembly compared to snap rings and higher strength. Stock GM Rocker arm bolts can be reused, or choose from our aftermarket bolt options. No. More. Broken. Rockers! - All new 1.7 ratio drop-in design rocker arm bodies - 46% Stronger than stock Chevrolet rockers in FEA analysis. - Extended tip design allows for higher valve lift and improved valve tip durability. - Superior Moment of Inertia compared to roller tip rockers for maximum RPM capability.

• BTR LS Shaft Rocker Arm Kit Pre Assembled – Upgraded shaft mount rocker system with BTR rocker bodies designed to improve valvetrain stability strength and reliability over factory rocker setups.
• Eliminates Factory Trunnion Bearing Failure – Shaft system replaces traditional trunnion design reducing risk of needle bearing failure and improving durability in performance LS engines.
• Fits Cathedral Port LS Engine Platforms – Compatible with LS1 LS2 LS6 LQ4 LQ9 LM7 L33 and other 4.8L 5.3L 5.7L and 6.0L LS engines using cathedral port cylinder heads.
• Improved Valvetrain Geometry and Stability – Shaft mounted design provides more consistent rocker motion better valve control and increased performance under higher RPM conditions.
• Ideal for Camshaft Upgrades and Performance Builds – Perfect for aggressive cam installs high horsepower builds and LS engines requiring stronger more reliable valvetrain components.