Great Post!!MORE INFO PLEASE
I love information and your post has a lot of it. thanks. I have a 2010 335i with 0ZMP and 0337 M SPORT PACKAGE. I just went under my car and the exhaust looks identical to the Preformance exhaust in your pictures. the only difference are the exhaust tips. mine look double walled and rolled. yours is single wall. I would like to upgrade to the preformance exhaust but i want to make sure I don't already have it. I'm pretty sure i don't but the pictures look the same!! If i don't then it looks like i'll only have to swap out the mufflers because the piping is exactly like your preformance exhaust pictures. Any one care to share their thoughts?