I take it you're in america? Over there does the 99/2000 VR6 have the 12v or 24v engine? Over here a car of that age has the 24v which responds pretty well to exhaust & remap If you're talking 12v VR6 an OBDII car should be making 180-190ish as standard, by the time you've bought exhaust/filter/cams you're over halfway to affording a SC without gaining much more than a better sound If you want more power forced induction is the way forward so imo wait until you have the $$ for a charger you wont be sorry