Right he doesn`t need to change his exhaust, up to him but if he`s going the Bluefin route he does need to get one with the decat file on it, will just save him money when he eventually turns to a decat or sportscat!!

Would advise that he maybe looks into the new Dreamscience module, basically same idea as the BF but a lot better regarding what you can do with it and value for money!