^^^ what he said, also jap spec S15 and aus spec s15 use the same injectors they are just run at different pressures. I think that why some people say 440, 470, 480 etc. Anyway I just had my s15 injectors cleaned and flow tested 4 were from a JDM s15 and 2 were from a ADM s15 and they all flowed exactly the same and actually came in at 500cc at 3bar rail pressure