Product Description
Genuine GM 12678746 Exhaust Valve for Gen V LT 6.2L Engines
Stock Replacement 1.59" Sodium-Filled Exhaust Valve for 2014-Newer L86 L87 LT1 LT4 6.2L Engines
Restore factory exhaust-side valvetrain performance in your Gen V LT-based 6.2L engine with this Genuine GM 12678746 Exhaust Valve. Designed as a stock replacement sodium-filled exhaust valve for compatible L86, L87, LT1, and LT4 engines, this valve is a direct service replacement for cylinder head repair, engine rebuilds, valve job service, or replacing a worn, damaged, bent, or burned original exhaust valve. Choose a single valve for targeted repair work or a set of 8 valves when replacing the full exhaust valve set on a complete 6.2L V8 engine.
Key Features & Benefits
- Genuine GM Stock Replacement Exhaust Valve: This Genuine GM exhaust valve is designed for compatible Gen V LT-based 6.2L engines requiring GM part number 12678746. It gives engine builders, machine shops, and repair technicians a factory replacement option when servicing the exhaust side of the cylinder head.
- Designed for L86, L87, LT1, and LT4 6.2L Engines: This valve is built for select 2014-newer 6.2L Gen V LT applications across Cadillac, Chevrolet, and GMC performance cars, trucks, and SUVs. It is a targeted replacement part for common 6.2L platforms including Escalade, Camaro, Corvette, Silverado, Sierra, Tahoe, Suburban, Yukon, and Yukon XL applications.
- 1.59" Head Diameter: The valve features a 1.59" head diameter to match the supplied stock replacement specification for compatible 6.2L Gen V LT exhaust valve applications. This makes it a practical choice during cylinder head service when replacing worn, damaged, overheated, bent, or otherwise unusable exhaust valves.
- Sodium-Filled Exhaust Valve Design: This Genuine GM exhaust valve uses a sodium-filled design for compatible factory-style 6.2L applications. Matching the original valve construction is important when maintaining the intended exhaust valve configuration during stock replacement repairs, valve jobs, and engine rebuilds.
- Single Valve or Set of 8 Options: Choose a single valve for a targeted cylinder repair or a set of 8 valves when replacing all exhaust valves on a complete 6.2L V8 engine. This option structure helps customers buy the correct quantity for one damaged valve, machine shop service, or a full cylinder head refresh.
Purchase Options
- Single Valve: Ideal for replacing one damaged or worn exhaust valve.
- Set of 8 Valves: Ideal for replacing all exhaust valves on a complete V8 engine set.
Specs
- Brand: Genuine GM
- GM Part Number: 12678746
- Product Type: Exhaust valve
- Engine Family: Gen V LT-based 6.2L engines
- Compatible Engine Codes: L86, L87, LT1, LT4
- Valve Location: Exhaust
- Head Diameter: 1.59"
- Valve Design: Sodium filled
- Available Quantity: Single valve or set of 8 valves
Key Fitments
- Fits 2014-Newer L86 L87 LT1 LT4 6.2L Engines
- Applications Include (6.2L Models Only):
- CADILLAC CT5 2022-2025
- CADILLAC CTS 2016-2019
- CADILLAC ESCALADE 2015-2024
- CHEVROLET CAMARO 2016-2024
- CHEVROLET CORVETTE 2014-2025
- CHEVROLET SILVERADO 1500 2014-2024
- CHEVROLET SUBURBAN 2019-2024
- CHEVROLET TAHOE 2018-2024
- GMC SIERRA 1500 2014-2025
- GMC YUKON 2015-2024
- GMC YUKON XL 2015-2024
