I don't think there's enough room in there to route the pipes through a cat and muffler/resonater and still dump out the rear portion of the front fender. While I love this look on the McLaren SLR and wouldn't mind it on my Crossfire, I just don't think it's easily accomplished.

Note I did not say it's impossible. You could always take you car to a custom fabricator and leave it with them for a few weeks, but you'd have to leave your checkbook and your first born child as well.