Skip to content
Questions? Give us a call or text: 800-964-5341
Questions? Give us a call or text: 800-964-5341

Rectangular Auxiliary Fuel Tanks

We offer multiple sizes and brands of rectangular auxiliary fuel tanks for sale. Sizes range from 30 gallons up to 110 gallons. We offer both aluminum and steel tanks. 

Browse rectangular auxiliary fuel tanks below or see all auxiliary fuel tanks.

Filters

  • $1,889.76 - $2,177.82
    $1,889.76 - $2,177.82
    $1,889.76 - $2,177.82
    $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...

    View full details
    $1,889.76 - $2,177.82
    $1,889.76 - $2,177.82
    $1,889.76 - $2,177.82
    $1,889.76
  • ATI AUX30R auxiliary fuel tank
    Save up to 15% Save %
    $675.00 - $776.47
    $675.00 - $776.47
    $675.00
    $573.75 - $660.00
    $573.75 - $660.00
    $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...

    View full details
    $675.00 - $776.47
    $675.00 - $776.47
    $675.00
    $573.75 - $660.00
    $573.75 - $660.00
    $573.75
    Save up to 15% Save %
  • ATI AUX58R auxiliary fuel tank
    Save up to 15% Save %
    $801.47 - $864.71
    $801.47 - $864.71
    $801.47
    $681.25 - $735.00
    $681.25 - $735.00
    $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...

    View full details
    $801.47 - $864.71
    $801.47 - $864.71
    $801.47
    $681.25 - $735.00
    $681.25 - $735.00
    $681.25
    Save up to 15% Save %
  • ATTA Sleeper Diesel Auxiliary Fuel Tank 110 gallon closeup
    Save 9% Save %
    $1,702.00
    $1,702.00 - $1,702.00
    $1,702.00
    $1,547.00
    $1,547.00 - $1,547.00
    $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...

    View full details
    $1,702.00
    $1,702.00 - $1,702.00
    $1,702.00
    $1,547.00
    $1,547.00 - $1,547.00
    $1,547.00
    Save 9% Save %
  • Transfer Flow Under Tonneau Cover Auxiliary Tank
    $1,745.26 - $1,870.62
    $1,745.26 - $1,870.62
    $1,745.26 - $1,870.62
    $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...

    View full details
    $1,745.26 - $1,870.62
    $1,745.26 - $1,870.62
    $1,745.26 - $1,870.62
    $1,745.26
  • The Fuelbox FT47 closeup
    Save up to 15% Save %
    $1,747.00 - $2,029.00
    $1,747.00 - $2,029.00
    $1,747.00
    $1,485.00 - $1,725.00
    $1,485.00 - $1,725.00
    $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...

    View full details
    $1,747.00 - $2,029.00
    $1,747.00 - $2,029.00
    $1,747.00
    $1,485.00 - $1,725.00
    $1,485.00 - $1,725.00
    $1,485.00
    Save up to 15% Save %
  • Diesel Auxiliary Under Toolbox Tank 30 Gallon
    Save 9% Save %
    $1,037.00
    $1,037.00 - $1,037.00
    $1,037.00
    $943.00
    $943.00 - $943.00
    $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...

    View full details
    $1,037.00
    $1,037.00 - $1,037.00
    $1,037.00
    $943.00
    $943.00 - $943.00
    $943.00
    Save 9% Save %
  • Save up to 9% Save %
    $904.00 - $1,459.00
    $904.00 - $1,459.00
    $904.00
    $822.00 - $1,326.00
    $822.00 - $1,326.00
    $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...

    View full details
    $904.00 - $1,459.00
    $904.00 - $1,459.00
    $904.00
    $822.00 - $1,326.00
    $822.00 - $1,326.00
    $822.00
    Save up to 9% Save %
  • ATTA Below Bed Rail Diesel Auxiliary Tank 45 gallons
    Save up to 9% Save %
    $949.00 - $1,372.00
    $949.00 - $1,372.00
    $949.00
    $863.00 - $1,247.00
    $863.00 - $1,247.00
    $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...

    View full details
    $949.00 - $1,372.00
    $949.00 - $1,372.00
    $949.00
    $863.00 - $1,247.00
    $863.00 - $1,247.00
    $863.00
    Save up to 9% Save %