Supertech BMW M50/M52/S50/S52 Black Nitrided Exhaust Valve - +1mm Oversize - Set of 8

These Supertech exhaust valves are black nitrided, a surface hardening process that makes the valve face tougher and more resistant to wear. This set includes eight +1mm oversize exhaust valves, specifically made for BMW M50, M52, S50, and S52 engines. Using oversize valves can be a smart move when rebuilding or modifying your engine, especially if the valve seats have been re-ground or if you're looking to improve flow slightly.

The black nitride treatment not only adds durability but also helps reduce friction, which is important for consistent valve operation at higher RPMs. Being 1mm oversize means these valves will fill the valve seat area a bit more completely than stock, which can be beneficial for sealing, particularly if the original seats aren't perfectly pristine. This is a well-built component that's a popular choice for BMW enthusiasts looking to refresh or enhance their engine's top end.

When installing these, remember they are designed as a direct replacement for the stock exhaust valves, but always refer to your engine's service manual for specific installation procedures and any required hardware or sealants. This set is a solid option for anyone working on these specific BMW inline-six engines.