Genuine BMW E85 E86 Z4M rear bumper cover. It's in very good condition. I had wanted to install it on my Z4 3.0si but ended up selling the car. It fits on all E85 and E86 Z4s. Shop I bought it from primed it but it will need to be re-primed and obviously painted.
If you're looking for one...then you know these are NLA (at least for now). I also have a brand new genuine middle insert (also NLA). It's an extra $75 if you need it.
Asking $600 (firm) and local pick up only.