I highly doubt the 230 would hold as much power as the mitsu block and your still stuck with having to pay someone else to tune it. I drove the xfire to a couple of exhaust shops today. Then I came home and ordered some mandrel bent 3 inch pipe and a Moroso spiral flow muffler from Jegs. I'm going to wait until the exhaust is done before I drive it on the street again. The car shifts a little early to second gear but perfect from 2nd to 3rd.