With a N75...the 4bar might be ok... the ECU can only pull out so much fuel and at stock boost it might throw a code...but with the N75 it might be ok... I would do it all at once..
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2000 Reflex Yellow 1.8T GLX Mods, O2M 6 speed, EFI systrms DFI, GT30 Turbo, MBC, 62ibs Injectors, 3in Downpipe and Exhaust,custom water/air ic, ATP Exhaust Manfold, ATP Fuel Pump,Adjustable FP Reg, AutoTech steel flywheel W/Power Clutch, and HKs BOV, stroked to 2.0L, ported head W/shrick cams. 11,70@122..Dyno 409HP 370TQ @ 12PSI on 116 Octane. Other cars, 07 Tahoe LTZ and 06 620HP LS2 427ci GTO..FTI cam,AFR Heads,FAST Intake,Kooks Headers, and 175 NX Nitrous..9.73@142 on nitrous..
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