Nitrous Oxide is taken from a Nitrous Bottle, into the Smart Box, through the Pressure Regulator, and then delivered to one or more Nitrous Nozzles.  These Nozzles spray liquid Nitrous into various places, blending with positive airflow, and increasing Horsepower.  Your Nozzle setup options have been outlined below - you can find out which setup is best for you by using our interactive BOSS NOSS kit selector. 

Single Air Box Nozzle Setup - As a basic setup, a single Nitrous Nozzle sprays a mist of liquid Nitrous into the Air Box.  As long as Nitrous blends with the positive air flow, your motor is sure to get a Horsepower charge. 
Twin Air Box Nozzle Setup -  Even better than the basic, the Twin Nozzle Air Box setup allows you to spray liquid Nitrous straight down the throat of the carburetors. 
Twin Filters Nozzle Setup - The most ideal way to inject Nitrous is to run two Nozzles and spray liquid Nitrous through aftermarket pods or filters.

In addition to choosing your Nozzle setup, you can decide how big of a Horsepower boost you want.  The size of your Horsepower boost is determined by the orifice size on the Nitrous Nozzle.  You can change Horsepower boosts by buying additional Nozzles, or by simple drilling a larger orifice.