Nitrous is legal as long as everything id withing regulations but half the time Cops have no clue what the regs are. Some people say the supply line has to be disconnected but i have never used it on the street, just at the track. On the way to bike night last night some tool came flying up on me on 71 and about rear ended me so i got over real quick, flipped him the bird and to my suprise he gave it back. Being that i was freaked that i almost got nailed from behind ( dont go there people) i sped up a little. He catches up and revs at me so i kick down a few and nail it while standing up rubbing my ass at him.