55 Gallon*, extra heavy duty, military grade, cross-linked polyethylene fuel tank. For 2013 and newer vehicles with DEF systems. Tank features .250 in. (1/4 in.) wall thickness, and comes complete with galvanized steel mounting straps, mounting bushings, rollover safety vent valves, and needed accessories.Tank features exclusive low fuel trap design. This TITAN tank only hangs approximately 2.5 in. lower than bottom of stock (OEM) tank. For model 2500 and 3500 Cummins Diesels with Crew (or Quad) Cabs and 8 ft. Long Beds.For model years 2013-2017. For 2500 & 3500 Models with Cummins Engines•LIFETIME Warranty