can anybody tell me what injectors i have in my 1995 subaru impreza wrx sti ra i already have following mods

front mounted intercooler
apexi fc comander
walbro motorsport fuel pump
16g tdo5h uprated turbo
hks induction kit
hks headers
uprated oil pump
hks 40si plugs
i would like to put 555 injectors

 

most probably 440's..................

 

My 550's run at just over 80% so 440's may be on there upper limits.