Mainline 4500 Carb System If you are a serious nitrous junkie on a tight budget we have what you have been waiting for! NX introduces Main Line Nitrous Systems. Main Line Systems benefit from the years of research and development that made Nitrous Express the leader in the nitrous world, but at a price even the most budget-restricted racer can afford. Just the basics, no frills, just rock solid performance at rock bottom prices. The ML1001 will outperform any other 250HP carbureted kit on the market, guaranteed to make 250HP. Most of it s competitors promise 250HP but only produce 160WHP! Includes: 10lb Nitrous Bottle with Standard Brass Valve Jetting for 100, 150, 200, 250HP Stainless Steel Bottle Brackets NX Mainline Nitrous Plate Stainless steel hardlines for solenoid mounting Mainline .078 orifice nitrous solenoid Mainline .112 orifice fuel solenoid 4AN stainless steel braided feedline 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!