The Transfer Flow TRAX 3 50 Gallon In-Bed Auxiliary Fuel Tank System is designed with a low profile and small footprint to fit under most tonneau covers and leave plenty of bed space. The auxiliary system is computer-controlled by Transer Flow's patented TRAX 3 operating system with patented AutoTrans technology, and is equipped with a NAPA-3270 (WIX 33270) fuel filter. Transfer Flow fuel tanks are built from ReliaSteel, high-yield U.S. aluminized steel; and powder coated black for superior corrosion resistance and strength. All TRAX 3 systems include an LCD module that displays fuel levels in both the main and auxiliary tanks. It has a six-year unlimited mile warranty and is made in the U.S.A.