I know that a friend of mine took his 23i to Supersprint in Italy , he asked if they wanted to do some R&D on his car, as he wanted a better exhaust(he wants a little more power in the near future and he likes tuned exhausts)....they are developing a new one, a really good one....he's quite sure that SS will retain twin exhaust for 23i and 30i, then double muffler for 35i(when they will be able to have one to modify)...
Francesco
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