FTP BMW N55 oil catch tank for E8X E9X F1XFeatures Increases Air Intake Efficiency Promotes Engine Longevity Non Clogging Air Oil Separation Double Baffle Free Flow Solid No Restriction Design Large Intake Exhaust No Tapering Down Stealth Mounting on Cool Side of the Motor Anodized Black Lightweight Aluminum P. S. as well as the trimmed factory N55 plastic engine cover (had to be trimmed a small amount for everything to fit)