Product Description
Genuine GM LS1 Rocker Arm 12681275 | Stock 1.7 Ratio LS Rocker Arm
Fits 1997-2013 LS Engines 4.8 5.3 5.7 6.0 | Genuine GM Rocker Arm | Intake & Exhaust LS Applications
Restore factory valvetrain performance with the Genuine GM LS1 Rocker Arm 12681275, the OEM replacement rocker arm used across a wide range of Gen III and Gen IV LS-based engines. Featuring the factory 1.7 rocker ratio, this rocker arm is designed to deliver reliable valve motion, quiet operation, and long-lasting durability for stock and mild performance applications. Ideal for engine rebuilds, maintenance, or replacing worn rocker arms, this genuine GM component ensures the fit, form, and function expected from original equipment parts. Available individually or as a complete set of 8, it’s the perfect solution for maintaining proper valvetrain geometry and dependable engine performance.
Key Features & Benefits
- Genuine GM OEM Quality: Factory original rocker arm engineered for dependable performance, durability, and precise valvetrain operation.
- Factory 1.7 Ratio Design: Maintains correct valve lift and rocker geometry for stock and mild performance LS engine applications.
- Ideal Stock Replacement: Perfect for replacing worn or damaged rocker arms during engine rebuilds, repairs, or maintenance.
- Multiple Purchase Options: Available as a single rocker arm or complete set of 8 to match your project needs.
- Broad LS Compatibility: Fits a wide variety of cathedral port and select rectangle port LS engine applications.
Key Fitments
- Fits Intake & Exhaust Positions: LS1 LS2 LS6 LY5 LMG LMF LH6 LC9 LY2 L20 L33 LQ4 LQ9 LR4 LM7 L59 LS4 LH8 LH9
- Fits Exhaust Position Only: LS3 L99 LSA L92 L9H L94 L76 L77 LY6 L96
- Fitment Notes: Fits 1997-2013 cathedral port LS heads 4.8L 5.3L 5.7L 6.0L. On 2007-later 6.0L and 6.2L rectangle port/LS3 heads, fits exhaust valve side only.
