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ATI Rectangular Diesel Aluminum Auxiliary Tank

SKU: AUX30R
$573.75 $675.00
You Save: $101.25 15%

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Aluminum Tank Industries rectangle aluminum auxiliary fuel tank is available in sizes that range from 30 gallons to 55 gallons.  These light weight aluminum fuel tanks offer a variety of sizes and shapes that easily fit in your bed space.

ATI auxiliary tanks are used to increase driving range and fuel capacity by as much as 80 gallons by connecting directly into your factory fuel tank through the factory filler neck. 

All ATI auxiliary tanks come standard with a 3/8″npt outlet, vent with rollover protection, automotive style fuel cap, and fully welded baffles to reduce slosh and add strength.

These tanks are constructed from rugged diamond plate aluminum and are all available with a black or white powder coated finish. Custom tanks are available upon request. 

ATI FUEL SHOTZ (Available as Optional Accessory on Product Page)

These tanks are designed for use with the ATI Fuel Shotz diesel install kits. The diesel FUEL SHOTZ installation kit can be installed in less than an hour.  The unique system connects the auxiliary tank to the factory tank vis the factory filler. 

This will keep your factory tank completely full until the auxiliary tank is empty. You will know your auxiliary tank is empty when your factory fuel gauge moves off the full mark. 

The FUEL SHOTZ system installs quickly and easily. No wires or switches to install.  The system has rollover protection on the tank and on the factory fill neck adaptor.  Detailed instructions are supplied with the FUEL SHOTZ installation kit.

Diesel Auxiliary Tank Sizes

ATI rectangular auxiliary tanks less than 50 gallons ship by UPS:

  • AUX30R: 30 Gallon - 48.5"L x 19"W x 9"H.
  • AUX41R: 41 Gallon - 48.5"L x 11"W x 19"H.
  • AUX42R: 42 Gallon - 48.5"L x 19"W x 12"H.
  • AUX43R: 43 Gallon* - 51"L x 12"W x 16.5"H.
  • AUX46R: 46 Gallon - 57"L x 12"W by 16.5"H.

See pictures of each tank size below:

*43 gallon size is notched with a bottom tank length of 51 inches and a top length of 58 inches.

AUX30R Under Toolbox Auxiliary Tank

ATI AUX30R auxiliary fuel tank

AUX30R: 30 gallon* - 48.5"L x 19"W x 9"H / fits short beds with tab modification

This tanks low 9 inch height is designed to fit underneath a truck bed mounted toolbox. 

If you have a short bed truck, you need to request a modification to move the side mounting tabs to the front and back of the tank (the two 1.5" side mounting tabs add 3 inches to the tank length).

*The AUX30R tank includes a 3.5 inch diagonal fill neck.  All other tanks have a 2.5 inch top mounted fill neck.

AUX41R Short Bed Auxiliary Tank

ATI AUX41R auxiliary fuel tank

AUX41R: 41 gallon - 48.5"L x 11"W x 19"H / fits short beds

The AUX41R will fit most short bed trucks that have 11 inches or greater space between the cab and the start of the wheel wells.

AUX42R Flat Auxiliary Tank

ATI AUX42R auxiliary fuel tank

AUX42R: 42 gallon - 48.5"L x 19"W x 12"H / fits short beds with tab modification

If you have a short bed truck, you need to request a modification to move the side mounting tabs to the front and back of the tank to allow the tank to pass between the wheel wells.

AUX43R Slim Auxiliary Tank

ATI AUX43R auxiliary fuel tank

AUX43R: 43 gallon* - 51"L x 12"W x 16.5"H / fits short beds

The AUX43R tank will fit short bed trucks with 12 inches or greater space between the cab and the start of the wheel wells. 

If you have less than 12 inches of space, you can request to move the side mounting tabs to the front and back of the tank so the 51 inch notched tank length can pass between the wheel well.

*AUX43R has a notched bottom length of 51 inches and a top length of 58 inches.

AUX46R Narrow Auxiliary Tank

ATI AUX46R auxiliary fuel tank

AUX46R: 46 gallon - 57"L x 12"W x 16.5"H / fits short beds

The AUX46R will fit short beds with 12 inches or greater space between the cab and the wheel wells.

Note: mounting tabs add 1.5 inches on each side of the tanks listed above.  The two mounting tabs on each side increase the tank length by 3 inches.

If you have a short bed truck you may need to add a modification to move the mounting tabs from the sides to the front & back so the tank can pass through the wheel well.  Please call or contact us if you have a short bed truck to confirm.

The fill neck adds 2.5 inches of height to the top of the tank and has a 2.5 inch diameter.  The fill neck is also located halfway between the center of the tank and the left edge of the tank.

All ATI diesel auxiliary tanks come standard with the following:

  • Meets DOT requirements for diesel auxiliary.
  • Custom auxiliary install kit included with tank.
  • All aluminum fuel tank construction.
  • Quick easy installation.
  • Tanks are baffled to reduce movement of contents.
  • No wires or switches to install.
  • Rollover protection.
  • Automotive style fill cap.
  • Hold down brackets.
  • Pressure and leak detection test.
  • Clean and free of debris inside and outside of the tank.
  • 1 year limited warranty.

ATI Auxiliary Tank Fuel Shotz Kit Installation Guide

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