like the sub says... which one out of the 3 is best?

 

I have used the NOS and the Shark, with the NX jetting the Shark seems to mix better. I can tell the difference in the way the motor sounds when you hit it. (no, really!! )

 

The NX nozzle is by far superior to the NOS nozzle. Much better atomization, and tuneups. As far as between the shark and the pirhana, it really depends on the manifold you are using. If its a single nozzle deal, mounted before the throttle body, I would use the Shark. If its a direct port kit, on a stock manifold with clearance problems, I would use the pirhana. The difference is just the size. The Shark uses 1/8 pipe, and the Pirhana uses 1/16. The Shark will go above 500hp, and the Pirhana is only good till 500. Hope this helps.