This NX dual stage direct port system provides the ultimate in cylinder to cylinder distribution. This system utilizes the patented NX SX2 dual stage nozzles that offer two separate stages on one nozzle! Nitrous system comes complete with nitrous bottle, 2 Super Shark nitrous solenoids (not included in all kits), 4 or 8 aluminum / carbon fiber Lightning fuel solenoids, stainless bottle brackets, stainless hard lines, 6 or 8 SX2 nozzles, jetting, and all necessary electrical components. This system requires the drilling and tapping of intake manifold. Some kits include nitrous / fuel rails instead of distribution blocks.