No idea but the Supersprint rear silencer for the 320iS sometimes offered as well and is also still available new, at a price that's not far away from the price this auction will end. Then you'll have a professional muffler you can trust...
In Italy we don't like Supersprint so much, because often we found no sound - no gain...
...however recently they have developed a real good stuff for the Honda Civic Type-R...good sound, high gain from medium revs
on supersprint websit there is a street legal centre pipe + exhaust for the is and a racing one for the M3...
...do you think the M3 racing centre + exhaust will fit?
I have bought the is center section from supersrint wicj«h is great and the stainless stil rear ende mufller also from supersprint which is loud enough. For me too loud so if you are intrested will sell for 200€ used it only for a week or so..
My muffler broke down this weekend, now the car is loud and slow.
If you tell me the code of your supersprint centre section and muffler, i see them on supersprint website and i'll let you know if i buy them from you.
Please tell me how many km you have done with them.