With the nitrous setup I am using on my Nytro, 45hp nozzles, I don't have to do anything with the clutching. I spoke with Jason at Straightline Performance and he told me that the NOS set I am using will provide a 600rpm gain so it is not enough to warrant a clutch mod since it is still within the rev limiter. As far as teh fule pump is concerned, again, this setup works on a stock sled. No fuel pump or fuel programmer necessary. This is a wet system so it provides its own fuel. I tapped into the fuel line with a T fitting. When you push the button, it activates a solenoid that allows the fuel and NOS to flow! There are no other mods necessary which is the beauty of this setup. For $810(complete kit), I have an extra 45 hp at the tip of my finger ready to explode at teh push of a button. Now for another $250, I can install bigger nozzles that will provide more NOS and thus more HP! I'm sure I'll be buying those later but taking baby steps right now. If I like how the NOS works on the Nytro, I am going to work with Jason on a setup for the VMAX4. I've attached a document from Straightline that talks a bit about their setup.