I have given up on it and just bought a godspeed down pipe. I have been talking to some people who know a lot about this and they said that the manga flow cats will not give enough pressure release for what i want to do.
What i am currently doing is pink STI 565cc injectors, uppipe, downpipe, catback, VF39 turbo, slight break upgrade (what i can afford).
I already have stage 2 clutch and light fly wheel and adjustable gas suspension also cobb access port. And other stuff that is not important to list.