All quite true. Do your WRX a favor and stop using the MBC.
Presently, fuel system hardware upgrades should not be needed with your set up.i apprieciate the help guys, i think i'll take your advice, and remove it. i do have a question though, you were saying that it would need more fuel to compensate for the air correct? what do u think i would need to compensate for it. injectors?, fuel pump?, fuel rail?