Product Description
BTR Brian Tooley Racing 1.7 Ratio LS Rocker Arms Without Bearings - Set of 8
1.7 Ratio Drop-In Design | Extended Valve Tip | Cathedral-Port and LS3/L92 Exhaust Applications
Upgrade your LS valvetrain with this set of eight BTR Brian Tooley Racing rocker arms featuring a bearingless 1.7-ratio drop-in design. FEA analysis found these rocker arms to be 46% stronger than stock Chevrolet rockers, while the extended-tip geometry accommodates higher valve lift and promotes improved valve-tip durability. They are designed for cathedral-port applications and can also be used on the exhaust side of compatible L92 and LS3 cylinder heads.
Key Features & Benefits
- 1.7-Ratio Drop-In Design: Each rocker arm features a 1.7 ratio and drop-in configuration for compatible LS valvetrain applications. This set includes eight rocker arms without bearings, allowing them to be paired with a compatible trunnion system selected for the engine combination.
- 46% Stronger in FEA Analysis: BTR’s finite element analysis found this design to be 46% stronger than stock Chevrolet rocker arms. The increased calculated strength supports performance valvetrain combinations operating with upgraded camshafts, valve springs and higher valve lift.
- Extended-Tip Rocker Design: An extended contact tip accommodates higher valve lift while improving valve-tip durability. This geometry helps maintain the intended rocker-to-valve interface in compatible LS combinations using performance-oriented camshaft and valvetrain components.
- Optimized Moment of Inertia: The rocker-arm design provides a superior moment of inertia compared with roller-tip rocker arms. This supports responsive valvetrain operation and BTR’s intended maximum-RPM performance without adding a separate roller assembly at the valve tip.
- Broad LS Cylinder-Head Compatibility: These rocker arms are designed for compatible cathedral-port LS cylinder heads and can be used in their standard rocker positions. They also work on the exhaust side of compatible square-port L92 and LS3 cylinder heads.
Notes
- Bronze-bushing trunnion kits may require the rocker-arm bores to be honed for proper fit.
- CHE trunnion kits will not work with these rocker arms.
Key Fitments
- 4.8 5.3 5.7 6.0 LS1 LS2 LS6 LS2 LS6
- LQ4 LQ9 LY5 LY6 LM7 L33
- Cathedral-port cylinder-head applications
- Square-port L92 and LS3 cylinder heads - exhaust side only
