NOS, is this possible

Thanks Stroker, I get it now. so would you use dry system on a EFI, provided you could inject more fuel through the injectors??

Yes. That's what the dry shot was actually marketed for. THe 5.0 rustang crowd. Most of the time the nitrous injector installs in a hole drilled into the plastic air hose going to the throttle body. Nitrous isn't a bad thing. You just need to do your homework. I probably won't end up doing it on mine but I am kicking it around.