I am at the moment getting my clutch replaced and to do this the front pipes are being taken off. I was thinking to replace them when they bolt everything back up. I have a POD, cat back exhaust, and boost to 12psi. What size front pipes should i get do you think with this level of modidication. And what power increases etc or advantages does these front pipes have? What have you guys paid for the one made up at a exhaust shop?? Thanks guys -