You won't need bigger injectors until you want to go 320BHP+.
You can run upto approx 340BHP on the 440's if you also use in conjunction with a uprated fuel pressure regulator.This is also a good time to change the fuel pump to an uprated 255lph unit or similar. Easier to fit an FPR then injectors.
Your ECU is an STi item and should have a pink label rather then the usual brown, black or green label used on the regular 99/00 models.
It will not have an ECUTEK license on it, so a remap will cost you full wack i.e approx £500-£700.
Without the remap and just fitting the FMIC you may get a little more power with the FMIC fitted due to the cooler charge but you may also get more lag. The difference in power will not really be noticable, but the lag may well be.
You could fit the FMIC and Turbo and a cheap boost controller, but would advise you get it checked for detonation and fuelling before you hoon it around too much.
I have a spare standard green label ECU you could borrow in the interim. This runs less aggresive timing and a richer mixture which would be safer then using the PPP ECU with the Turbo and FMIC.
A remap is the ultimate answer but if money is hard to come by the above is an interim option.
the boost control would be under Boost Controller control rather then ECU control so the swap of ECU wouldn't effect your target boost levels.
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