For those of you running nitrous, which plug are you using? I've heard of some people using the stock DP's but now I'm thinking NGK's are my best route.
OK... but for the total time that you drive your car, what percent?
Do you drive your car everyday? If you do, do you plan to run NOX once a week? More? Less?
You probably want to use plugs rated for the operating condition of the engine. At least over 75% of the time you run the engine.
So... if you drive your car an hour everyday and drive seven days a week and only run NOX for less than five minutes that week, you are probably better off to use the regular stock autolite PP plugs.
If you have performance problems while running the NOX, then you might consider something different.