Nitrous Express 4 Cyl Vortec Nitrous Kit (Pro-Mod) w/2.5lb BottleWow, how do I start to tell the world why NX is different and better than any other company? Lets start with the NX philosophy: All components must be of the highest quality, no off shore junk; 99% of NX products are produced and assembled in the USA; All NX components and systems must be tested and proven before they are shipped to any customers; All horsepower claims must be accurate and dyno proven at the wheel! NX copies no one; we lead the