This is an AC Schnitzer Rear Apron for a 2004 and newer BMW E63 E64 6 Series (not M6). These aprons come primed for painting to match your car's color. If you've seen the AC Schnitzer aerodynamic enhancements on an E63 or E64 before then you know how dramatic of a difference it makes. It's a very sexy enhancement.
The photo is property of AC Schnitzer and is used here for illustrative purposes only.
PART # 5112 63110