Not necessarily. For a price of ~$500 not too much can come close to touching the power increase with adding N2O. You do have to refill it all the time, but that's about it. If a stock block is good for 400+hp, there's no reason why it HAS to all come from forced induction. But you do have to smart about it. Wet shot, small jets, timing retard, all the good stuff. Anybody remember good ol Noslaser from DSMtalk? He huffed some pretty big doses of N2O on a stock engine.
As for the legality of N2O, in the US, it is illegal for use on public streets, but it is LEGAL to have in the car, as long as you can show it isn't in use. I *believe* the same applies in BC. Do a search on ricescene on the police forums and you'll find the answer.
You don't need a roll bar to run N2O. You don't need checker plate either. If you DO want to go with NOS, I'd advise some expert help with the matter.
Jovan, the checker plate in FNF was a problem only because it was polished. The 3 thou reduction in the surface roughness typically results in a corresponding reduction in the fundamental frequency of the checker plate as a whole. This brings it down to the excitation frequencies the unibody tends to exhibit when subject to the forcing function described by the NOS delivery jet angle relation. Stock checked plate is non-polished, remember?
