The Nitrous Express 4 Valve Plate System features a billet nitrous plate that fits behind the throttle body making installation quick, simple, and attractive.? The system includes aluminum and carbon fiber solenoids for ultimate performance and weight savings.? The system includes an electronic TPS activated wide open throttle switch, 15 foot nitrous feed line, master arming switch, relay, relay harness, and all necessary hardware to complete installation.? System comes with jetting from 35hp-300hp.? System can be purchased with 5, 10 or 15lb bottle, all of which include the Billet aluminum Lightning 45 bottle valve. Fits 1996-2004 Cobras and 2003-2004 Mach 1 Mustangs.