Michigan Motorsports Exhaust Valve - Like GM Part #12678745 - Fits 2014+ L83 L84 L82 L8B 5.3L Gen V Engines - OEM Replacement for Direct Fit - Single Valve or Set of 8 (8)

The GM 12678745 Exhaust Valve is an OEM replacement designed specifically for 2014+ L83, L84, L82, and L8B 5.3L Gen V engines. Whether you're replacing a single damaged valve or performing a complete cylinder head refresh, these exhaust valves ensure optimal airflow, compression, and durability. A worn or failing exhaust valve can cause loss of power, rough idling, increased fuel consumption, and cylinder misfires. This direct-fit valve restores proper sealing, allowing your engine to run smoothly and efficiently. Built to GM factory specifications, these valves are ideal for engine repairs, cylinder head rebuilds, and performance maintenance, offering long-lasting durability for daily-driven trucks, performance builds, and towing applications.

• OEM Replacement Exhaust Valve for Gen V 5.3L Engines – The GM 12678745 exhaust valve is a direct-fit replacement designed for L83, L84, L82, and L8B Gen V 5.3L V8 engines, ensuring factory-level performance and durability.
• Available in Single or Set of 8 – Choose between a single replacement exhaust valve or a full set of 8, ideal for engine rebuilds, cylinder head repairs, and valve replacements.
• Restores Engine Efficiency & Power – Worn or damaged exhaust valves can cause compression loss, misfires, and poor fuel economy. Replacing them restores engine performance, efficiency, and longevity.
• High-Quality OEM Construction – Manufactured to GM factory specifications, these exhaust valves provide proper sealing, heat resistance, and durability for stock or mildly modified applications.
• Direct Fit & Easy Installation – Designed for a perfect fit, eliminating the need for modifications. Ideal for repairing valve damage, upgrading to fresh components, or full engine rebuilds.