The NOS Programmable Nitrous Controllers are the perfect upgrade to virtually any nitrous system. This handy device can be programmed to independently control up to 4 stages of nitrous from a laptop computer or via an available full color 3.5" LCD touch-screen. These features enable racers to fine-tune the power of an engine to current track/weather conditions, save files for quick setup at different tracks and use the NOSBUS network cable for seamless integration with other Holley/NOS products!