I have the TST "twins" program/EZ stack. Even though I haven't had it dyno'd because of my stock transmission, (full DTT and FASS 150 pusher being installed in 3 weeks) the guys at DTT said I will be right at or above the 500 hp mark. I would suggest that you upgrade your turbo & transmission right away if you want to run this kind of power. I blew my stock turbo within 2 hrs. after install. After those two are done, have fun!