I would suggest getting a tune after changing your FMIC. Just so you know though, the stock FMIC is rated to about 400 hp or something like that (I dont remember the exact number off the top of my head). I would try to find a FMIC that has a Garrett core or something that has a bar and plate design. It will hold higher boost levels than a tube and fin design will.
06 GG Evo SE
I WANNA GO FAST