how can you tell which exhaust you have on a 325i 1990, 2 piece or 3 piece?
my exhaust system is like this
manifold --> down pipes (not seperate!) leads to the/a center box?? --> lastly the back box?
to me that is a 2 piece system? is this correct?
also anybody know why it was changed? any performance difference between 2 - 3?? are they interchangable 2 - 3?
thanks.






