Product Description
Genuine GM LS1 Rocker Arms 12681275 Set of 16 | OEM 1.7 Ratio LS Rocker Arms
Fits 1997-2013 LS Engines 4.8 5.3 5.7 6.0 | Genuine GM OEM Rocker Arm Set | Cathedral Port LS Applications
Restore factory valvetrain performance with this Genuine GM LS1 Rocker Arm Set of 16, part number 12681275. These OEM 1.7 ratio rocker arms are the same factory-style components used across a wide range of Gen III and Gen IV LS engines, delivering reliable operation, proper valve motion, and long-term durability. Perfect for stock rebuilds, maintenance, or replacing worn rocker arms, this complete set comes packaged in genuine GM packaging for confidence in fit and quality. Designed for cathedral port LS heads and select rectangle port applications, these rocker arms maintain factory geometry and dependable valvetrain performance in both daily-driven and mild performance engines.
Key Features & Benefits
- Genuine GM OEM Components: Factory original rocker arms engineered for precise fitment, durability, and reliable valvetrain performance.
- Complete Set of 16: Includes enough rocker arms to service a complete V8 engine and comes packaged in genuine GM packaging.
- Factory 1.7 Ratio Design: Maintains correct valve lift and factory valvetrain geometry for stock and mild performance applications.
- Ideal for Engine Refreshes: Perfect for replacing worn rocker arms during rebuilds, repairs, or preventative maintenance.
- Wide LS Compatibility: Compatible with numerous cathedral port LS engines and select rectangle port exhaust 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.
