ooh...so its fine that i use back my original so4 fuel pump then...cuz when i adjust my fuel regulator to 3 bar with h22a injector...during 7000rpm-7500rpm...i can feel it the rpm is heavy n have back fire...so i tune down around 2 bar..its juz fine...it can rev till 9000rpm smoothly.Thanks 4 ur info dcloo...cuz i saw many of the performance vtec go 4 borch fuel pump or sr20.That's y i m curious...