yea man i think that it is possible to get ur goal, but i think u should get intercooler piping just to help. Also i got my GS-T in the high 13 with my stock turbo. i got a FMIC and turbo back exhaust no cat, ported o2 housing, ported manifold, ported intake manifold, intake and FIPK, and then full suspension and all that good stuff on 13 psi. and it was on pump gas