The rectangle diesel aluminum auxiliary tank is the most popular in the lineup. Our standard diesel auxiliary fuel tanks range from 30 to 80 gallons. If you want to keep most of your bed space check out our more slender aluminium fuel tank designs, some only require 9". We also have a lay down style that fits under most crossover toolboxes.

Show: 

Length (In)
Min
Width (In)
Min
Height (In)
Min
Gallons
Min
Max
Max
Max
Max
  Clear
RDS 18 Gallon Rectangle General Purpose Fuel Tank
Model:
RDS-59044
Manufacturer:
Ships From:
Florida
Price:
$237.34
This is the RDS 18 Gallon Rectangle General Purpose Fuel Tank. This general purpose fuel tank is perfect for boats, generators, pressure washers or other applications which require gasoline or diesel fuel. Works…
RDS 18 Gallon Rectangle General Purpose Fuel Tank (Chrome Cap)
Model:
RDS-62533
Manufacturer:
Ships From:
Florida
Price:
$237.34
This is the RDS 18 Gallon Rectangle General Purpose Fuel Tank with Chrome Cap. This general purpose fuel tank is perfect for boats, generators, pressure washers or other applications which require gasoline or diesel…
RDS 20 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
RDS-72587
Manufacturer:
Ships From:
Florida
Price:
$294.45
This is the RDS 20 Gallon Rectangle Diesel Auxiliary Tank. This tank offers extra fuel capacity for a generator or other specialty application using diesel fuel. All tanks Meet DOT standards. Diesel Install kits…
RDS 40 Gallon Rectangle Notched Diesel Auxiliary Fuel Tank
Model:
RDS-70387
Manufacturer:
Ships From:
Florida
Price:
$426.89
This is the RDS 40 Gallon Rectangle Notched Diesel Auxiliary Tank. An Ideal option for fifth wheel applications. Auxiliary tanks can be used as additional capacity for a factory tank with the use of an…
RDS 60 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
RDS-72771
Manufacturer:
Ships From:
Florida
Price:
$456.44
This is the RDS 60 Gallon Rectangle Diesel Auxiliary Tank. Increase driving range with an auxiliary fuel tank! Auxiliary tanks can be used as additional capacity for a factory tank with the use of…
RDS 33 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
RDS-71804
Manufacturer:
Ships From:
Florida
Price:
$459.14
This is the RDS 33 Gallon Rectangle Diesel Auxiliary Tank. Increase driving range with an auxiliary fuel tank! Auxiliary tanks can be used as additional capacity for a factory tank with the use of…
ATI 30 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
ATI-AUX30RIK
Manufacturer:
Ships From:
Florida
Price:
$475.55
The ATI 30 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck. Diesel installation kit available for all Ford, Dodge and GM models (Select the correct model from…
ATI 41 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
ATI-AUX41RIK
Manufacturer:
Ships From:
Florida
Price:
$486.85
The ATI 41 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck. Diesel installation kit available for all Ford, Dodge and GM models (Select the correct model from…
ATI 42 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
ATI-AUX42RIK
Manufacturer:
Ships From:
Florida
Price:
$489.99
The ATI 42 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck. Diesel installation kit available for all Ford, Dodge and GM models (Select the correct model from…
ATI 46 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
ATI-AUX46RIK
Manufacturer:
Ships From:
Florida
Price:
$528.07
The ATI 46 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck. Diesel installation kit available for all Ford, Dodge and GM models (Select the correct model from…
ATI 43 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
ATI-AUX43RIK
Manufacturer:
Ships From:
Florida
Price:
$559.99
The ATI 43 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck. Diesel installation kit available for all Ford, Dodge and GM models (Select the correct model from…
ATI 51 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
ATI-AUX51RIK
Manufacturer:
Ships From:
Florida
Price:
$561.81
The ATI 51 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck. Diesel installation kit available for all Ford, Dodge and GM models (Select the correct model from…
ATI 66 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
ATI-AUX66RIK
Manufacturer:
Ships From:
Florida
Price:
$588.70
The ATI 66 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck. Diesel installation kit available for all Ford, Dodge and GM models (Select the correct model from…
ATI 58 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
ATI-AUX58RIK
Manufacturer:
Ships From:
Florida
Price:
$599.99
The ATI 58 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck. Diesel installation kit available for all Ford, Dodge and GM models (Select the correct model from…
ATI 62 Gallon Rectangle Diesel Auxiliary Fuel Tank
Model:
ATI-AUX65RIK
Manufacturer:
Ships From:
Florida
Price:
$603.85
The ATI 62 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck. Diesel installation kit available for all Ford, Dodge and GM models (Select the correct model from…
ATTA 40 Gallon Diesel Auxiliary Fuel Tank (Mill Finish)
Model:
AL40RU
Manufacturer:
Ships From:
Texas
Price:
$685.99
The AL40RU, in Mill Finish, is the 40 gallon rectangular economy tank is the only standard stock auxiliary tank that is constructed from .125 mil aluminum. The AL40RU is the narrowest tank at only 10"…
ATTA 40 Gallon Diesel Auxiliary Fuel Tank (Treadplate Finish)
Model:
AT40RU
Manufacturer:
Ships From:
Texas
Price:
$706.99
The AT40RU, in treadplate finish, is the 40 gallon rectangular economy tank is the only standard stock auxiliary tank that is constructed from .125 mil aluminum. The AT40RU is the narrowest tank at only 10"…
ATTA 50 Gallon Diesel Auxiliary Fuel Tank
Model:
AT50RU
Manufacturer:
Ships From:
Texas
Price:
$747.99
The AT50RU, the 50 gallon rectangular tank is the most popular rectangular auxiliary tank. The AT50RU, is only 12" wide so it uses very little bed space. It will fit any short or long bed…
ATTA 50 Gallon Diesel Auxiliary Fuel Tank (Dodge Ram Box)
Model:
AT50R-DB
Manufacturer:
Ships From:
Texas
Price:
$747.99
The AT50R-DB, the 50 gallon rectangular tank is designed to fit a Dodge Truck with the RAM BOX. CAPACITY: 50 gallons MATERIAL: .125 gauge aluminum/ fully baffled DIMENSIONS: 47" L x 18" W x 18" H FILL…
ATTA 80 Gallon Diesel Auxiliary Fuel Tank
Model:
AT80R
Manufacturer:
Ships From:
Texas
Price:
$872.99
The AT80R, is the most popular aluminum rectangular tank. The 80 gallon ractangular tank is constructed from .125 gauge aluminum and is fully baffled. Comes standard with driver's side fill neck. The body of the…
ATTA 99 Gallon Diesel Auxiliary Fuel Tank
Model:
AT99R
Manufacturer:
Ships From:
Texas
Price:
$1,039.99
The AT99R, the aluminum 99 gallon rectangular tank is designed for full size long bed diesel trucks only. The AT99R comes standard with dual fuel fill necks for easier and faster fueling. This auxiliary tank…
ATTA 110 Gallon Diesel Auxiliary Fuel Tank
Model:
AT110R
Manufacturer:
Ships From:
Texas
Price:
$1,092.99
The AT110R, is a 110 gallon rectangular aluminum auxiliary fuel tank. This fuel tank is designed for long bed (8 Foot) Ford, Dodge, and GM/Chevrolet diesel trucks. Constructed from durable .125 gauge aluminum and is…
ATTA 110 Gallon Sleeper Diesel Auxiliary Fuel Tank
Model:
AT110RSL
Manufacturer:
Ships From:
Texas
Price:
$1,248.99
The AT110RSL, is a 110 gallon rectangular aluminum auxiliary fuel tank designed to fit underneath a truck bed mounted sleeper. This fuel tank is designed for long bed (8 Foot) Ford, Dodge, and GM/Chevrolet diesel…
Result Pages: