We could advertise a larger capacity, but we chose to only market usable capacity to set honest and reasonable expectations for our customers. The Titan XXL tank also features minimal hang down below the bottom of the stock tank (approximately only 2.5" lower). Installation is a breeze - no fabrication or cutting required. This tank is a direct fit, bolt-in application, making it the perfect upgrade for your Ford F250 or F350 pickup. Application For model year: 2011-2016. For F250 HD and F350 HD models with the Power Stroke engine. Note: For use with diesel fuel ONLY. Additional Details. The TITAN tank is 34 gallons larger at 60 gallons. The stock tank is only 26 gallons. Will not interfere with powered steps, air bag systems and most other accessories. Our mid-ship, direct replacement fuel tanks are designed to use your trucks stock/OE sending unit. However, our tanks are compatible with Fleece, AirDog, FASS, etc. This tank does NOT fit cab & chassis models. It is ONLY for use on trucks with traditional pick-up truck short beds.