when i first got my fd i got excited,and went to the first shop i saw and ordered a hks downpipe, hks cat-back,and an apexi safc. my car runs alright its been on there for almost a year and about 6k miles. I was told the safc is not good on an fd, and the guy who put it on is a moron.
I guess what im getting at is which fuel cpu should i get with the mods i already have, and mabe a mid pipe?
I have been considering the pfc and the AEM plug and play. (i also plan on going to a single tubo in the future).
thanks in advance.....

 

With only two mods of DP and cat back, you do not need anything else unless you plan on running more than 12PSI boost. The safc should be good enough for what you have have as if it is adjusted correctly along with AFR test, it tricks the ECU to inject more fuel.
But IMOHO, the SAFC is not needed for what you have if boost is kept below 12PSI.

Do more research on these forumns and learn before going further.