40 Gallon*, auxiliary, aft-axle fuel tank, galvanized mounting straps, fuel lines, and TITAN Electronic Controller. Generation 6 (4020217) • Adds an additional 40 gallons of range to the truck's fuel system, by transferring fuel to the original equipment, mid-ship tank. • Features TITAN's famous, military grade, cross-linked polymer, aft-axle tank. • Includes TITAN's Electronic Controller management system, sending unit, transfer pump, wiring, fuel lines, and mounting straps. • Optional filler neck assembly is also available. Like all fine TITAN products, this proven design has undergone extensive testing. Our legendary tank products are so tough and well-tested that we back them with a Lifetime Warranty+! No drilling or fabrication required for installation.