So i replaced the diffuser which was a little tricky but fitment seems to be bang on. Had to file some of the tabs a bit to play around with it and it worked out just fine. Spoiler took so much time sawing away with the fishing line while using the heat gun. Only issue is the residue
. Cannot take it off even with googone. Not sure what to do. What would you guys suggest? Should I just take it to BMW? It's probably gonna cost me a fortune. Here are a couple of pics.