The ATI 80 Gallon Auxiliary Diesel Fuel Tank (L-Shape) is a high-capacity auxiliary solution designed to maximize diesel fuel range while allowing compatibility with bed-mounted toolboxes. The L-shape configuration positions the tank around existing toolbox space, making it ideal for work trucks that require both extended range and organized storage. 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 pumps or electrical components. Constructed from premium aluminum, the tank is DOT approved for highway and commercial use , meeting and exceeding Title 49 CFR 393.65 requirements. Designed specifically for auxiliary diesel fuel applications , ATI delivers durable, American-made performance for demanding work environments.