AISI 304 stainless steel Cooper Rings bite into the aluminum head for a stronger seal

which leads to premature bearing wear and can cause early engine failure

It is a part of the K-series engine family

Suitable for moderate to high-performance applications

CAT Cams offers the right camshaft for your needs

BMW S38 Valves by SuperTech Exhaust Valves:33 mm AISI 304 stainless steel CooperEngineered for the legendary BMW S38 inline six, the SuperTech High Performance Valve Kit delivers the durability, reliability, and airflow needed for high output applications. Designed to withstand high RPM, extreme temperatures, and intense performance demands, these valves are the ideal upgrade for E28 M5, E34 M5, and E24 M6 builds. Trusted by top engine builders, SuperTechs precision engineered valves optimize airflow, enhancing horsepower,