Thanks for letting me know that. I've searched all over, i'm not looking into making my own unless someone else has before and knows the exact parts needed to do so. Yes i have searched the board, but i am still trying to find the right intake/chip/exhaust for my xfire. I was looking into just replacing the OEM muffler w/ a magnaflow/flowmaster but my main concern is i want to KEEP my stock tips. Also as for intake, yah i'd like true cold air but if i can't get that then i guess something like above will have to do. And as for a chip, oh well UPsolute seems to be the choice BUT i am not sending out my ECU and i'm in NY and not traveling... So that seems to be out of the question.