Im nearly complete designing my NO2 Kit. I have a 94 540i and figured that the fuel system on it would be adequate for quite a large boost. I was going to change my fuel pump first since it has 150K miles, but other than that, I figured it was ready to go. Anyone have advice on when its time to step up the fuel flow? If that's necessary, I figured bigger injectors would do the trick. The stock emmisions system is capable of compensating for the N2O by adding alot more fuel right? I was pretty much just planning on going for it with custom solenoid valves, while relying on the stock 02 sensors to manage everything.