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Questions? Call or Text our US based team: 800-964-5341

Auxiliary Fuel Tanks for Sale

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.

    Original price $1,889.76 - Original price $2,177.82
    Original price
    $1,889.76 - $2,177.82
    $1,889.76 - $2,177.82
    Current price $1,889.76

    Transfer Flow In-Bed Auxiliary Fuel Tank System

    Transfer Flow

    The Transfer Flow In-Bed auxiliary fuel tank is designed to be compatible with almost any diesel truck, including half-ton pickups, trucks with uti...

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    Original price $1,889.76 - Original price $2,177.82
    Original price
    $1,889.76 - $2,177.82
    $1,889.76 - $2,177.82
    Current price $1,889.76
    Original price $675.00 - Original price $776.47
    Original price $675.00 - Original price $776.47
    Original price $675.00
    $573.75 - $660.00
    $573.75 - $660.00
    Current price $573.75

    ATI Rectangular Diesel Aluminum Auxiliary Tank

    Aluminum Tank Industries

    Aluminum Tank Industries rectangle aluminum auxiliary fuel tank is available in sizes that range from 30 gallons to 55 gallons.  These light weigh...

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    Original price $675.00 - Original price $776.47
    Original price $675.00 - Original price $776.47
    Original price $675.00
    $573.75 - $660.00
    $573.75 - $660.00
    Current price $573.75
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    Original price $801.47 - Original price $864.71
    Original price $801.47 - Original price $864.71
    Original price $801.47
    $681.25 - $735.00
    $681.25 - $735.00
    Current price $681.25

    ATI Diesel Aluminum Auxiliary Tank

    Aluminum Tank Industries

    Aluminum Tank Industries rectangle aluminum auxiliary fuel tank is available in sizes that range from 51 gallons to 66 gallons.  These light weigh...

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    Original price $801.47 - Original price $864.71
    Original price $801.47 - Original price $864.71
    Original price $801.47
    $681.25 - $735.00
    $681.25 - $735.00
    Current price $681.25
    Save up to 15% Save %
    Original price $1,161.00 - Original price $1,404.00
    Original price $1,161.00 - Original price $1,404.00
    Original price $1,161.00
    $1,055.00 - $1,276.00
    $1,055.00 - $1,276.00
    Current price $1,055.00

    ATTA Diesel Auxiliary Roll-Top Bedcover Tank

    ATTA

    The aluminum ATTA Auxiliary Roll-Top Bedcover Tank is designed to be in conjunction with a roll-top bed cover. The aluminum auxiliary diesel tank ...

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    Original price $1,161.00 - Original price $1,404.00
    Original price $1,161.00 - Original price $1,404.00
    Original price $1,161.00
    $1,055.00 - $1,276.00
    $1,055.00 - $1,276.00
    Current price $1,055.00
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    Original price $1,702.00
    Original price $1,702.00 - Original price $1,702.00
    Original price $1,702.00
    Current price $1,547.00
    $1,547.00 - $1,547.00
    Current price $1,547.00

    ATTA Sleeper Diesel Auxiliary Fuel Tank

    ATTA

    The aluminum ATTA Sleeper Diesel Auxiliary Fuel Tank is a 110 gallon rectangular aluminum auxiliary fuel tank designed to fit underneath a truck b...

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    Original price $1,702.00
    Original price $1,702.00 - Original price $1,702.00
    Original price $1,702.00
    Current price $1,547.00
    $1,547.00 - $1,547.00
    Current price $1,547.00
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    Original price $1,118.00 - Original price $1,628.00
    Original price $1,118.00 - Original price $1,628.00
    Original price $1,118.00
    $1,016.00 - $1,357.00
    $1,016.00 - $1,357.00
    Current price $1,016.00

    ATTA Diesel Extreme Wedge Auxiliary Fuel Tank

    ATTA

    ATTA Aluminum Extreme Wedge Style fuel tanks are constructed from .125 gauge aluminum. Wedge Style tanks are designed for full size Dodge, Ford, a...

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    Original price $1,118.00 - Original price $1,628.00
    Original price $1,118.00 - Original price $1,628.00
    Original price $1,118.00
    $1,016.00 - $1,357.00
    $1,016.00 - $1,357.00
    Current price $1,016.00
    Save up to 17% Save %
    Original price $1,745.26 - Original price $1,870.62
    Original price
    $1,745.26 - $1,870.62
    $1,745.26 - $1,870.62
    Current price $1,745.26

    Transfer Flow Low Profile Under Tonneau Auxiliary Fuel Tank

    Transfer Flow

    The low profile Transfer Flow auxiliary fuel tank is designed to fit under tonneau covers.  Choose from 40 or 50 gallon sizes. Either option offers...

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    Original price $1,745.26 - Original price $1,870.62
    Original price
    $1,745.26 - $1,870.62
    $1,745.26 - $1,870.62
    Current price $1,745.26
    Original price $2,159.00 - Original price $2,299.00
    Original price $2,159.00 - Original price $2,299.00
    Original price $2,159.00
    $1,900.00 - $2,135.00
    $1,900.00 - $2,135.00
    Current price $1,900.00

    The Fuelbox Under Tonneau Fuel Tank Toolbox Combo

    The Fuelbox

    The Fuelbox Under Tonneau is a low profile fuel tank toolbox combo.  This fuel tank toolbox combo is designed to work with most tonneau covers. Th...

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    Original price $2,159.00 - Original price $2,299.00
    Original price $2,159.00 - Original price $2,299.00
    Original price $2,159.00
    $1,900.00 - $2,135.00
    $1,900.00 - $2,135.00
    Current price $1,900.00
    Save up to 12% Save %
    Original price $2,467.73 - Original price $3,293.60
    Original price
    $2,467.73 - $3,293.60
    $2,467.73 - $3,293.60
    Current price $2,467.73

    Transfer Flow Auxiliary Fuel Tank Tool Box Combo

    Transfer Flow

    The Transfer Flow auxiliary fuel tank and toolbox combo is the best of both worlds, providing more fuel and secure storage for all your adventures....

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    Original price $2,467.73 - Original price $3,293.60
    Original price
    $2,467.73 - $3,293.60
    $2,467.73 - $3,293.60
    Current price $2,467.73
    Original price $1,941.00
    Original price $1,941.00 - Original price $1,941.00
    Original price $1,941.00
    Current price $1,650.00
    $1,650.00 - $1,650.00
    Current price $1,650.00

    The Fuelbox Wedge Auxiliary Fuel Transfer Tank

    The Fuelbox

    The Fuelbox Wedge Auxiliary Fuel Transfer Tank is an in bed diesel fuel tank. The wedge tank is designed for flatbed pickups only 65 inches long. *...

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    Original price $1,941.00
    Original price $1,941.00 - Original price $1,941.00
    Original price $1,941.00
    Current price $1,650.00
    $1,650.00 - $1,650.00
    Current price $1,650.00
    Save 15% Save %
    Original price $1,941.00 - Original price $2,000.00
    Original price $1,941.00 - Original price $2,000.00
    Original price $1,941.00
    $1,650.00 - $1,700.00
    $1,650.00 - $1,700.00
    Current price $1,650.00

    The Fuelbox L Shaped Auxiliary Fuel Transfer Tank

    The Fuelbox

    The Fuelbox L-Shaped Auxiliary Fuel Transfer Tank is an in bed diesel fuel tank. Choose whether you want to use this fuel tank as a transfer tank o...

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    Original price $1,941.00 - Original price $2,000.00
    Original price $1,941.00 - Original price $2,000.00
    Original price $1,941.00
    $1,650.00 - $1,700.00
    $1,650.00 - $1,700.00
    Current price $1,650.00
    Save up to 15% Save %
    Original price $1,747.00 - Original price $2,029.00
    Original price $1,747.00 - Original price $2,029.00
    Original price $1,747.00
    $1,485.00 - $1,725.00
    $1,485.00 - $1,725.00
    Current price $1,485.00

    The Fuelbox Auxiliary Fuel Transfer Tank

    The Fuelbox

    The Fuelbox Auxiliary Fuel Transfer Tank is an in bed diesel fuel tank. Choose whether you want to use this fuel tank as a transfer tank or an auxi...

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    Original price $1,747.00 - Original price $2,029.00
    Original price $1,747.00 - Original price $2,029.00
    Original price $1,747.00
    $1,485.00 - $1,725.00
    $1,485.00 - $1,725.00
    Current price $1,485.00
    Save up to 15% Save %
    Original price $1,526.00
    Original price $1,526.00 - Original price $1,526.00
    Original price $1,526.00
    Current price $1,387.00
    $1,387.00 - $1,387.00
    Current price $1,387.00

    ATTA Diesel Auxiliary Tank & Toolbox Combo AT50TT

    ATTA

    ATTA Diesel Auxiliary Tank & Toolbox combos provide an ideal solution for securely storing a 50 gallon auxiliary fuel tank and a toolbox in an...

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    Original price $1,526.00
    Original price $1,526.00 - Original price $1,526.00
    Original price $1,526.00
    Current price $1,387.00
    $1,387.00 - $1,387.00
    Current price $1,387.00
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    Original price $1,557.00 - Original price $1,615.00
    Original price $1,557.00 - Original price $1,615.00
    Original price $1,557.00
    $1,415.00 - $1,468.00
    $1,415.00 - $1,468.00
    Current price $1,415.00

    ATTA L-Shape Diesel Auxiliary Tank

    ATTA

    The 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...

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    Original price $1,557.00 - Original price $1,615.00
    Original price $1,557.00 - Original price $1,615.00
    Original price $1,557.00
    $1,415.00 - $1,468.00
    $1,415.00 - $1,468.00
    Current price $1,415.00
    Save up to 9% Save %
    Original price $1,037.00
    Original price $1,037.00 - Original price $1,037.00
    Original price $1,037.00
    Current price $943.00
    $943.00 - $943.00
    Current price $943.00

    ATTA Diesel Auxiliary Low Profile Under Toolbox Tank

    ATTA

    The aluminum ATTA low profile under toolbox fuel tank is designed for short beds only. The Under Toolbox fuel tank is designed to work in conjunct...

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    Original price $1,037.00
    Original price $1,037.00 - Original price $1,037.00
    Original price $1,037.00
    Current price $943.00
    $943.00 - $943.00
    Current price $943.00
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    Original price $991.00 - Original price $1,310.00
    Original price $991.00 - Original price $1,310.00
    Original price $991.00
    $901.00 - $1,191.00
    $901.00 - $1,191.00
    Current price $901.00

    ATTA Diesel Wedge Auxiliary Fuel Tank

    ATTA

    ATTA Aluminum standard wedge tanks give you more of the custom look compared to a standard rectangular tank. The standard wedge auxiliary tank is ...

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    Original price $991.00 - Original price $1,310.00
    Original price $991.00 - Original price $1,310.00
    Original price $991.00
    $901.00 - $1,191.00
    $901.00 - $1,191.00
    Current price $901.00
    Save up to 9% Save %
    Original price $904.00 - Original price $1,459.00
    Original price $904.00 - Original price $1,459.00
    Original price $904.00
    $822.00 - $1,326.00
    $822.00 - $1,326.00
    Current price $822.00

    ATTA Rectangular Diesel Auxiliary Fuel Tank

    ATTA

    ATTA rectangular diesel auxiliary fuel tanks are designed with .125 aluminum gage and are available in sizes that range from 40 gallons to 110 gall...

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    Original price $904.00 - Original price $1,459.00
    Original price $904.00 - Original price $1,459.00
    Original price $904.00
    $822.00 - $1,326.00
    $822.00 - $1,326.00
    Current price $822.00
    Save up to 9% Save %
    Original price $949.00 - Original price $1,372.00
    Original price $949.00 - Original price $1,372.00
    Original price $949.00
    $863.00 - $1,247.00
    $863.00 - $1,247.00
    Current price $863.00

    ATTA Low Profile Below Bed Rail Diesel Auxiliary Tank

    ATTA

    ATTA 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...

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    Original price $949.00 - Original price $1,372.00
    Original price $949.00 - Original price $1,372.00
    Original price $949.00
    $863.00 - $1,247.00
    $863.00 - $1,247.00
    Current price $863.00
    Save up to 9% Save %
    Original price $855.88
    Original price $855.88 - Original price $855.88
    Original price $855.88
    Current price $706.25
    $706.25 - $706.25
    Current price $706.25

    ATI Wedge Auxiliary Fuel Tank

    Aluminum Tank Industries

    ATI 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...

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    Original price $855.88
    Original price $855.88 - Original price $855.88
    Original price $855.88
    Current price $706.25
    $706.25 - $706.25
    Current price $706.25
    Save 17% Save %
    Original price $855.88
    Original price $855.88 - Original price $855.88
    Original price $855.88
    Current price $803.75
    $803.75 - $803.75
    Current price $803.75

    ATI L-Shaped Auxiliary Fuel Tank

    Aluminum Tank Industries

    ATI 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 fits...

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    Original price $855.88
    Original price $855.88 - Original price $855.88
    Original price $855.88
    Current price $803.75
    $803.75 - $803.75
    Current price $803.75
    Save 6% Save %