Do you mean one pipe on the left one on the right or a duel pipe right next to each other?
This is mine with Ragazzon.
Exhausts It took a lot of fitting as from the passenger side back box a pipe extends sideways to the drivers side. The rear bumper needs to be cut out and the original cutout passenger side needs to be moved sideways and filled in. It is a lot of work and i did not realise this when i bought it, like you i wanted it but i don't think i would do it again.
There are other exhausts that have this duel pipe set out but they do it slightly different but you again will have to cut the rear bumper and get a good bodyshop to make it look neat, too big a chunks cut out looks naff. As i said i would just get a good quality stainless single and the money you would have spent on all the duel pipe fitting/adjustment on having the whole system stainless. Speak to Joe aka Country Crusing, Nigel and motormech or Flea aka FCperformance i believe they all know about/supply stainless exhausts.
Tom
NB. if you want a Ragazzon i got a very good deal from coupedetail in Germany better than the official site.
Tom.