ok so imma sellin my truck soon and plannin on an exhaust after i sell it. but im debating what to get that will compliment my intake the best and give me a good sound but really the most power possible. i have an 08 gs with a fujita cai in it. im lookin at 3 systems an injen super ses, an ark dt-p system and for the third getting a custom one built for my car. really i wana know what would give me the most power possible