Call or Text our US based team: 800-964-5341 Mon to Sun 9am-9pm ET
Call our US based team:
800-964-5341
Mon to Sun 9am-9pm ET
We offer a full line of Auxiliary Fuel Tanks for sale. Choose from sizes that start at 30 gallons and increase up to 110 gallons. We offer a variety of designs including rectangle, L Shaped, wedge, and low profiles.
Auxiliary fuel tanks allow you to transfer diesel fuel directly into your truck's factory gas tank. We do not sell Gas Auxiliary Fuel Tanks.
Not sure which tank is best for your truck?
The Transfer Flow steel auxiliary fuel tank is designed for short bed and long bed diesel trucks. Choose from the following options: 37 Gallon Un...
View full detailsThe ATI aluminum diamond plate auxiliary tank transfers diesel fuel from your auxiliary tank directly into your diesel truck's fuel tank. Auxiliar...
View full detailsAluminum Tank Industries rectangle aluminum auxiliary fuel tank is available in sizes that range from 51 gallons to 66 gallons. These light weight...
View full detailsThe aluminum ATTA Auxiliary Roll-Top Bedcover Tank is designed to be in conjunction with a roll-top bed cover. The aluminum auxiliary diesel tank...
View full detailsThe aluminum ATTA Sleeper Diesel Auxiliary Fuel Tank is a 110 gallon rectangular aluminum auxiliary fuel tank designed to fit underneath a truck b...
View full detailsATTA Aluminum Extreme Wedge Style fuel tanks are constructed from .125 gauge aluminum. Wedge Style tanks are designed for full size Dodge, Ford, a...
View full detailsThe low profile Transfer Flow steel auxiliary fuel tank is designed to fit under tonneau covers for short and long bed trucks. The under bed cover ...
View full detailsThe Fuelbox Under Tonneau aluminum L-Shaped Auxiliary Fuel Transfer Tank is designed to fit short bed trucks with a canister style tonneau cover. ...
View full detailsThe Fuelbox Auxiliary Fuel Transfer Tank is a 50 gallon aluminum diesel fuel tank. Choose whether you want to use this fuel tank as a transfer tank...
View full detailsThe aluminum ATTA L-Shape auxiliary diesel tank is for long beds only. It comes standard with duel fill necks for easier fueling. L-Shape tanks w...
View full detailsThe aluminum ATTA low profile under toolbox fuel tank is designed for short beds only. The Under Toolbox fuel tank is designed to work in conjuncti...
View full detailsATTA Aluminum standard wedge tanks give you more of the custom look compared to a standard rectangular tank. The standard wedge auxiliary tank is ...
View full detailsATTA rectangular diesel auxiliary fuel tanks are designed with .125 aluminum gage and are available in sizes that range from 40 gallons to 110 gall...
View full detailsATTA Low Profile Below Bed Rail rectangular tanks are designed to be used with a hard or soft bed cover. The highest portion of the tank will be b...
View full detailsATI aluminum wedge diesel auxiliary fuel tanks are designed for flatbeds and pickups with a 5th wheel. The tank slopes at a 45 degree angle on the ...
View full detailsATI aluminum diesel L-shaped auxiliary fuel tanks are designed to work with a crossover style toolbox or chest box. The bottom of the L-shape fit...
View full detailsThe Transfer Flow 40 gallon Under Tool Box Auxiliary fuel tank is designed to fit underneath bed rail toolboxes. The low profile steel auxiliary fu...
View full detailsThe following section highlights a few our top diesel auxiliary fuel tanks. We offer options for both short and long bed trucks.
ATI's diesel auxiliary tank mounts directly to your truck bed.
Available sizes range from 38 to 46 gallons (ships by UPS).
Use the gravity feed fuel shotz kit to transfer diesel fuel directly to your truck fuel tank.
*43 gallon size is notched with a bottom tank length of 51 inches and a top length of 58 inches.
ATI offers larger in bed auxiliary tanks with sizes ranging from 51 gallons to 66 gallons.
Transfer diesel fuel using a gravity feed auxiliary fuel kit.
*51 gallon size has a 55 inch notched bottom length and 60" top length.
*58 gallon size has a 51 inch notched bottom length and 58 inch top length.
*62 gallon size has a 54 inch notched bottom length and 60 inch top length.
Transfer Flow's steel in bed auxiliary tanks included a highly advanced diesel fuel auxiliary system that will transfer fuel with an app from your phone.
Both sizes will fit under a standard tonneau cover.
Select the 40 or 50 gallon size for short bed trucks.
*The fill neck adds 2.5 inches of height to the top of the tank and is included in the listed height.
L Shaped auxiliary fuel tanks offer flexibility and additional fuel capacity. These tanks can fit under a bed rail toolbox.
You can also transfer diesel fuel to your truck fuel tank with the fuel transfer kit.
Drivers with a 5th wheel prefer wedge shaped auxiliary tanks because of the higher fuel capacity and the sloped design which provides better viewing the truck bed.
See our guide to the best Auxiliary Fuel Systems.
Unsure of the Best Tank Size? See our Auxiliary Tank Size List by Size & Brand:
