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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.

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RDS 18 Gallon Rectangle General Purpose Fuel Tank (Chrome Cap)

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…

Manufacturer
RDS Manufacturing
Model
RDS-62533
Ships From
Florida
RDS 18 Gallon Rectangle General Purpose Fuel Tank

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…

Manufacturer
RDS Manufacturing
Model
RDS-59044
Ships From
Florida
RDS 20 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
RDS Manufacturing
Model
RDS-72587
Ships From
Florida
RDS 40 Gallon Rectangle Notched Diesel Auxiliary Fuel Tank

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…

Manufacturer
RDS Manufacturing
Model
RDS-70387
Ships From
Florida
RDS 60 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
RDS Manufacturing
Model
RDS-72771
Ships From
Florida
RDS 33 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
RDS Manufacturing
Model
RDS-71804
Ships From
Florida
ATI 30 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX30RIK
Ships From
Florida
ATI 41 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX41RIK
Ships From
Florida
ATI 42 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX42RIK
Ships From
Florida
ATI 46 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX46RIK
Ships From
Florida
ATI 43 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX43RIK
Ships From
Florida
ATI 51 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX51RIK
Ships From
Florida
ATI 66 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX66RIK
Ships From
Florida
ATI 58 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX58RIK
Ships From
Florida
ATI 62 Gallon Rectangle Diesel Auxiliary Fuel Tank

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…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX65RIK
Ships From
Florida
ATTA 40 Gallon Diesel Auxiliary Fuel Tank (Mill Finish)

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"…

Manufacturer
ATTA
Model
AL40RU
Ships From
Texas
ATTA 40 Gallon Diesel Auxiliary Fuel Tank (Treadplate Finish)

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"…

Manufacturer
ATTA
Model
AT40RU
Ships From
Texas
ATTA 50 Gallon Diesel Auxiliary Fuel Tank

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…

Manufacturer
ATTA
Model
AT50RU
Ships From
Texas
ATTA 50 Gallon Diesel Auxiliary Fuel Tank (Dodge Ram Box)

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…

Manufacturer
ATTA
Model
AT50R-DB
Ships From
Texas
ATTA 80 Gallon Diesel Auxiliary Fuel Tank

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…

Manufacturer
ATTA
Model
AT80R
Ships From
Texas
ATTA 99 Gallon Diesel Auxiliary Fuel Tank

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…

Manufacturer
ATTA
Model
AT99R
Ships From
Texas
ATTA 110 Gallon Diesel Auxiliary Fuel Tank

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…

Manufacturer
ATTA
Model
AT110R
Ships From
Texas
ATTA 110 Gallon Sleeper Diesel Auxiliary Fuel Tank

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…

Manufacturer
ATTA
Model
AT110RSL
Ships From
Texas
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