I was going to ask the same question.
Although only my back box has gone, it looks like the original 1 piece exhaust is fitted so I've got to do the lot.
Other related questions:
Do I have a cat. converter? Just wondering.
Any suggestions for uk suppliers? Best quote I've had is £280, including fitting.
If I do it myself, what other things will I need, Gaskets, etc.?
What are people's opinions on things like http://www.modmart.co.uk/T3S.HTM? I know they're nothing like BMW's, but at 15% of the dealer price....!!
TIA.
Ben