MainLine Carbureted System; 100-250 HP; w/10 lb. Bottle; For 4150 Holley Flange. Wow, how do I start to tell the world why NX is different and better than any other company? NX copies no one; we lead the industry in technology and innovation; Never be satisfied with the status quo; Always give the customer more than he expects! Weve been in business for over nine years and are committed to providing excellent products with exceptional service. If you have any questions or problems, we are more than happy to address your concerns. The item “Nitrous Express Mainline Holley 4150 4bbl Plate Kit System Bottle New 100-250hp” is in sale since Tuesday, May 12, 2015. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts\Turbos, Nitrous, Superchargers\Nitrous & Parts”. The seller is “abad71camaro” and is located in Columbus, Georgia. This item can be shipped to United States.