The problem with a lot of the nitrous kits available is the components are just not large enough. We need big parts to make big power. A ton of the kits out there run small lines, solenoids, or nozzels. A typical kit we sell/use will have 2 .125 solenoids, -6 line, and nozzels that will outflow the solenoids.
The new NX kits are really cool as they use a programable controller that can vary the nitrous based on boost pressure. This means we can setup a tune for any condition dyno, track, street, etc. and it will work for all. You will also be assured of a smooth application of nitrous and the ability to induce it sooner and use a larger amount.
The NX kits are a bargain for the components you get..... Yes it is more expensive than lesser kits but it is a proven performer that can make tons of power.
Doug