The ATI 42 Gallon Auxiliary Diesel Fuel Tank is a balanced extended-range solution designed to add diesel fuel capacity while maintaining practical truck bed space. This auxiliary tank connects to the factory fuel system using a Gravity Feed Installation Kit (sold separately), allowing diesel fuel to transfer naturally into the primary tank without the use of a pump. Constructed from premium aluminum, the tank is DOT approved for highway and commercial use , meeting and exceeding Title 49 CFR 393.65 requirements. Purpose-built for auxiliary diesel fuel applications , ATI tanks deliver reliable, American-made performance for work trucks, fleet vehicles, and long-distance operators.