Is there a reason that you haven't tried water/meth injection? I'm trying for the same goal, with pretty much the same mods but gonna put a injection kit on. It should get you up and over 400

 

i eliminated that 2.5" kink by the cat flange and now its full 3". i also removed the catback resonator thats located before the muffler sounds great....

 

whats the fun in that??? i dont trust water/meth. i want to hit 400 on pump and i think i can being there is still a few good mods i have yet to purchase... my last evo i went straight to big turbo and never really got to enjoy the stock turbo...so im going ***** to the wall with this evo and stock turbo...plus im getting more into road racing so the quick response of the stock turbo is great