4150 RNC Conventiona Plate System 300-750Hp with 15Lb Bottle Nitrous Express NX 55140-15 - USA-NX-55140-15 - The conventional RNC (Restricted Nitrous Class) systems are the first choice for professional racers that are limited by jet size. These systems feature a CNC billet nitrous plate with enlarged nitrous passages, a .375" orifice Lightning nitrous solenoid, 8an feed line and a .500 orifice Lightning 500 bottle valve. The combination of these components results in a very dense liquid nitrous charge which allows the maximum amount of nitrous flow through a certain size jet. Results of these RNC systems are so impressive that you will have to use one to believe it.  Nitrous Express RNC (restricted class nitrous) systems are guaranteed to make the most power per jet size of any system on the market. If you don't make the most horsepower or are not 100% satisfied, NX will gladly refund you 100%. Includes: 8AN Feedline 6AN-4AN custom line from the N2O solenoid to the plate .375" N2O Solenoid .310" Fuel Solenoid Solenoid Mounting Plate Heavy Duty Relay and Harness WOT Activation Switch Master Arming Switch Stainless Steel Brackets (included with systems that include a bottle) Jetting from 300-750HP Every nut, bolt and electrical connector needed to complete the installation If you have an aftermarket engine management system that is capable of adding nitrous enrichment fuel and want this system DRY (no fuel components), please contact us. THE NITRO BOTTLE IS EMPTY!