what narks me, is that BMW have the bare faced cheek to charge £500 ish for the performance exhaust for a 318 (performance 318? theres a joke!) but then to charge over £800 for the 6 cylinder version!!
They look identical, and i'm fairly sure there no more manufacturing costs, parts or materials involved in making the one for the 325/330 etc.
It's just massively inflated costs designed to take advantage of people willing to pay for the priviledge of having a 6 cylinder BMW.