I paid less than $700 for my Performance exhaust and did the install myself. I just can't see spending $2k-$3k on an exhaust for something that wasn't a dedicated race car, particularly since doing so might result in a non-street legal car (and since performance wouldn't be increased by much more anyway).
Modding can be great fun, but you definitely can reach a point of diminishing returns. IMO a $2500 exhaust for a $30k 128i is beyond that point.
__________________
____________________________
|