The NXD Stacker Systems let you stack nitrous on your existing diesel chip. Guaranteed to boost horsepower and torque, erase that ugly black smoke and dramatically reduce exhaust temperatures. NXD Stacker systems are the ultimate safe, cost effective add-on for your modified diesel engine, All Stacker systems include billet and carbon fiber Lightning series solenoids, a 15 lb. nitrous bottle with the industry exclusive billet aluminum, high flow lightning bottle valve, stainless braided feed line, nickel plated fittings and every nut, bolt and electrical connector needed to perform the installation.