The best way to add a port to monitor actual oil pressure, very useful beyond the stock yes/no oil pressure sensor. 

This works great on the BMW M50, M52, S54, M54, N52 and more engines. 

Screws into the standard oil pressure switch port and allows the stock sensor to screw into the backside. On the side a 1/8npt port is available for use with a proper pressure sensor. 

Truly the most clean way to get accurate oil pressure on these engines. For turbo oil feeds, we recommend the Vanos Turbo Oil Feed Hose kit we offer, over tapping into this location.