Heya, I'm a newbie to the bimmer world, only bought mine a few weeks ago! the exhaust was a bit worse for wear so the first thing i had to do was treat myself to a new stainless system.
A friend of mine recommended MIJ performance centre in Walsall, i went along after making an appointment and was immediately impressed by the look of the building and the attentive service of the staff! After a consultation i decided to have a replacement back box with twin tailpipes. The efficiency and customer service was great! I wasn't treated like a clueless female and after about and hour or so, i ended up with the exact sound i wanted and the tailpipes look awesome!
All i can say is, thank god my friend recommended them to me, I would 100% recommend them to anybody