Ignore what's on there site, I'm talking about there universal back boxes if they have them for mustangs and S8's I can imagine they could dig up something for a 3 series. Even factory made exhausts use the same back box for a range of cars the only difference is the pipe work. There is usually only one way the pipes can be bent and welded under a car, this isn't going to differ greatly wether you have a factory made or a custom made exhaust.Originally Posted by Peter-E36