Hi all i'm in the process of purchasing some injectors for my R33.The ones that i'm buying are nismo 555cc will they fit in the factory rail.Also the next service the car is having a High flow gcg stage 2 turbo,injectors,Z32,power fc, installed will i need a fuel regulator as well or am i safe without.I already have a bosch 910 pump.So what ya reckon.Am looking for around 300hp.