the problem w/ the nitrous is a couple things... no matter how much you know about it, its always a big risk. and mazda doesnt have the best track record of building strong engines... and the shock of nitrous is second to nothing. you can do it safe, but then you're not talking about gaining alot of power. nitrous is most famous for its uses on engines that are generally considered bulletproof, aka 2jz, sr20, large, fully built chevy and ford v8s, and almost anything those bastards at honda make lol. i just dont see n20 as a viable option on a mazda engine, no matter how much you've built it