Used when removing the SAP (secondary air pump) and EGR system to simplify the exhaust system. Please research what is all required to delete this system (modified ECU, Stand-Alone engine management, etc.). Includes gasket.
These only work with M50/S50 US motors that have updated M52/S52 headers
Fit ALL M52/S52 EXCEPT: E39 528i, E46 323i & 328i (these use the other design)