Selling as it doesn't fit an e90 sedan m3, this diffuser is for a e92/e93 coupe. Challenge replica I believe as it doesnt have any markings anywhere, the box says ROCK west Composites on it. It has a couple imperfections as seen in pictures, right side has a scuff aswell, shouldn't be to noticeable when installed. Can have more pics upon request. Pm me some offers. Thanks