Aftermarket Fuel Tanks


The Daily Driver

Customers who drive their trucks daily appreciate the freedom and efficiency that additional onboard fuel provides. Whether you’re running errands around town or taking long road trips, a Transfer Flow fuel system adds ease and reliability to your travels. Replacement fuel tanks maximize mileage without taking up space in the truck bed, while in-bed auxiliary tanks automatically transfer fuel to the stock tank or replacement tank using our patented TRAX 3™ Auto-Trans operating system.

The Adventurer

Customers who like to adventure with an RV or fifth-wheel know it can be tricky and time-consuming pulling into a fuel station with a large haul. Installing a convenient in-bed auxiliary fuel tank can save significant time and money by providing the opportunity to fill up at the best price and leave those high-demand fuel stations in the dust. Opt for one of our tool box combination tanks for additional space to secure your supplies and gear.

The Thrill-Seeker

Customers who are in it for the thrill have plenty of fuel to keep the momentum alive! Whether you're racing ATVs on dunes, riding dirt bikes off road, or making new tracks in fresh snow, our refueling tank will keep the throttle revving mile after mile. Transfer Flow refueling tanks are DOT (Department of Transportation) legal in all 50 U.S. states to carry and transfer gasoline, diesel, ethanol, methanol, kerosene, or aviation fuel.


We diligently source the finest U.S. materials for all our fuel tank systems and accessories. Our tank systems are crafted with 12- and 14-gauge ReliaSteel®, high-yield U.S. aluminized steel, powder coated for a longer lasting, durable finish.


Transfer Flow fuel tanks are safe, legal, and reliable. Our fuel tanks go through rigorous durability testing, including multiple pressure tests and a 30-foot drop test, to ensure we are manufacturing the safest and most reliable products to fuel your adventures.

We meet regulation standards for emissions set by the California Air Resources Board, the U.S. Department of Transportation, and the Environment Protection Agency. Even the fasteners we use for tank installation meet the regulations specified by the American National Standards Institute, the National Fire Protection Association, and the Recreation Vehicle Industry Association.

Due to safety, environmental, and legal concerns, Transfer Flow will not endorse, design, install, or sell gravity-fed fuel systems because of their inherent risks. With gravity-fed systems, if the valve, connectors, or fuel line malfunction, or you simply forget to close the valve, there’s nothing to prevent over-filling and causing a dangerous fuel spill.

By installing a gravity-fed system, you’re also disabling the safety features of your vehicle’s fuel system. Instead, opt for a hassle-free Transfer Flow system with our patented TRAX 3™ technology, offering the best in convenience, reliability, and safety.


Install at Transfer Flow

If you are interested in visiting our manufacturing facility in Chico, California, we’d be happy to install your new fuel tank system for you. While you’re here, enjoy a facility tour, learn how our fuel tanks are made, and meet the craftsmen behind the product.

Locate an Installer Near You

With more than 325 qualified installers across the country, it’s easy to locate an installer near you using our installer map. You can order your Transfer Flow fuel tank through us and have it shipped to your selected installer or order the fuel tank through the installer directly.

Do-It-Yourself Installation

If you want to get your hands dirty, you can install the fuel tank yourself. Our tank systems come with comprehensive step-by-step instructions to make installation a breeze. We also have installation videos on our YouTube channel to walk you through each step of the process.