Supertech BMW B58/B48 Inconel Single Groove Sodium Filled Exhaust Valve - Set of 12

Supertech's Inconel exhaust valves are a solid option for BMW B58 and B48 engines, especially when you're pushing the limits of performance. These valves are built to handle the extreme heat and stress found in high-performance applications, making them a critical component for serious engine builds. The set includes 12 valves, covering all exhaust ports for your engine.

What sets these valves apart is their construction from Inconel, a superalloy known for its exceptional resistance to high temperatures and corrosion. This material is crucial for exhaust valves, as they endure the hottest gases exiting the combustion chamber. The single groove design is optimized for specific valve spring and retainer setups, ensuring proper sealing and operation. Furthermore, these valves feature sodium filling. The sodium inside the valve stem melts at operating temperature, and its movement within the hollow stem helps transfer heat away from the valve face and into the cylinder head. This improved heat dissipation is key to preventing valve seat recession and maintaining performance under sustained high loads. This advanced cooling method is a notable feature for engines that see track use or aggressive driving.

When rebuilding or significantly upgrading the top end of your BMW B58 or B48 engine, components like these valves are essential for reliability and performance. Ensure you consult your engine builder or service manual for proper installation procedures and compatibility with your specific valve train components. This set is designed as a direct replacement for the stock exhaust valves, offering an improved solution for demanding applications.