Quote Originally Posted by Peter-E36
"rocket surgery"? I was on the magnaflow site and only found they offered one for an e30 325. Decent brands make a different exhaust for the 316/318 as they do for the 138iS as 320/323 as 325/328 so surely they go through that trouble to make sure that at the very least performance isn't affected negatively. Don't want to spend money getting one made up that will spoil performance
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.