Titans Fuel Tank

Titan Fuel Tanks: Redefining Diesel Truck Fuel Capacity

For diesel truck owners who spend long hours on the road, tow heavy loads, or venture into remote territory, the factory fuel tank is often the weakest link in the chain. Titan Fuel Tanks was founded in 2003 specifically to solve that problem — engineering high-capacity fuel tanks that drop into the stock location, use the factory fuel gauge, and can effectively double a truck's driving range between fill-ups.

The XLHDPE Advantage: Military-Grade Material

What separates Titan's fuel tanks from the competition starts at the molecular level. Every Titan tank body is molded from High-Density Cross-Linked Polyethylene (XLHDPE) — the same material and processes used by the U.S. Department of Defense for fuel tanks in military combat vehicles. Unlike the linear polyethylene found in most OEM and aftermarket tanks, XLHDPE's molecular chains are chemically bonded into a continuous three-dimensional structure. The result is impressive: Titan's tanks deliver 20 times the environmental stress crack resistance, 10 times the molecular weight, and 5 times the impact strength compared to standard OEM linear polyethylene tanks.

That seamless, one-piece construction also means there are no welds to fail, no corrosion risk, and superior resistance to extreme temperatures — hot desert highways or sub-zero winter mornings. The material is also especially well-suited for biodiesel applications and is far less prone to internal condensation than metal alternatives.

Product Lines: XXL Replacement Tanks, Auxiliary Systems & More

Titan's fuel tank lineup spans a wide range of diesel truck applications, with fitments covering Ford Power Stroke, Ram Cummins, GM Duramax, Nissan Titan XD, and Mercedes/Dodge Sprinter platforms. Key product families include:

• XXL Midship Replacement Tanks: The core of Titan's lineup. These direct-fit, under-body tanks replace the OEM tank in the same cavity and range from roughly 39 to 67 gallons depending on application — up to double the stock capacity. The latest Gen 7 generation tanks feature updated construction for 2025+ model year trucks, with capacities of 50, 52, and 55 gallons for Cummins-powered Ram 2500/3500s.
• After-Axle Auxiliary Tanks: Frame-mounted auxiliary tanks that add up to 40 gallons of capacity and integrate with Titan's Electronic Controller management system, which transfers fuel to the primary tank at the touch of a button — without invading the truck's wiring harness or OBD system.
• Spare Tire Auxiliary Fuel System (STAFS): An industry-first innovation that adds 30 gallons of additional fuel capacity to most American-made diesel pickups without taking up any cargo space.
• Travel Trekker In-Bed Tanks: Available up to 50 gallons, these in-bed XLHDPE tanks are baffled to minimize fuel slosh and compact enough to work with most in-bed hitches and tonneau covers.

Titan Tech, Fast Fill, and Drop-Test Proven Durability

Titan's commitment to engineering extends beyond the tank itself. The Titan Tech programmer updates a truck's distance-to-empty readout to accurately reflect the larger tank capacity. The Fast Fill Vent Kit enables Gen 7 XXL tanks to accept fuel seamlessly at high-flow truck stop pumps without pressure buildup or spillage. And Titan's quality assurance process includes physical drop tests — filling tanks completely and dropping them 30 feet onto a steel plate to verify zero leakage.

Every Titan fuel tank is backed by a lifetime warranty and is approved for use in all 50 states. These tanks are made in the U.S.A. and are sold across the U.S., Canada, and Australia — wherever American diesel trucks operate.