I am wanting to upgrade my fuel system I have a 2200 turbo 5 psi 23lb injectors stock fuel pump. I want to redo the fuel system before i have the car dyno tuned that away I no everything is fresh. I have looked at all the forums for the walbro 255 and stuff I am still a little unclear on witch pump to use the walbro 190 or the 255 and I am no sure on the part numbers if anyone could give me some advice I would greatly appreciate it.