Want to get rid of the plastic oil cap on your BMW S58-powered vehicles including the G8X M3/4, and the X3/4M SUVs, and add some nice billet pop to your engine bay? Look no further than the VTT S58 Billet Oil cap. These are a true Billet oil cap machined from 6061-T6, and anodized in a variety of colors. These are NOT thin cap that snaps over your existing oil cap. Currently, we offer them in 4 colors