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TITAN Fuel Tanks is America’s leading manufacturer of high-capacity aftermarket fuel tanks made of military-grade polymer. TITAN Fuel Tanks stand out in the market by enabling you to drive your pickup more than twice as long between fill ups. Anyone who travels or pulls a payload knows that factory-equipped fuel tanks in diesel pickups limit range. Our tanks allow you to extend the range in your pickup by up to 500 miles or more depending on the make and model of your vehicle. Put an end to the headaches on long road trips; save time improve range. Specifications.