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

ATI Custom Diesel Auxiliary Fuel Tank


Questions? Call our US Based team: 1-800-964-5341 (9am-9pm; 7 days a week)

Original price $1.00 - Original price $1.00
Original price
$1.00 - $1.00
Current price $1.00

5 to 6 Week Lead Time for Custom Tanks

Please use the below "Request a Custom Tank Quote" button to request a custom tank quote.

Please include the following information in the message:

  • Requested tank capacity (in gallons).
  • Tank Type (Rectangular, L-Shaped, Wedge).
  • Requested Dimensions in inches (Length x Width x Height)
  • Truck Make & Model & Bed Size.
  • Optional Accessories: Black Powder Coat, Tank Mount Fuel Gauge, Locking Fuel Cap.

*Final custom tank quote price based on requested tank size & dimensions.

Request a Custom Tank Quote (Include Shipping Address)

Aluminum Tank Industries custom aluminum diesel auxiliary fuel tanks are used to increase driving range and fuel capacity by connecting directly into your truck's factory fuel tank through the factory filler neck. 

The ATI custom diesel auxiliary fuel tank requires the ATI Fuel Shotz kit to transfer fuel to your diesel truck.  The ATI Fuel Shotz Kit will be automatically added to your ATI custom auxiliary tank quote you receive by email.

Final pricing for custom tanks is based on the size and dimensions of the requested tank and will be provided to you by email after submitting the request a custom tank quote button found on the top right side of the product page for all custom tanks.

Custom tank lead time is approx. 4 to 6 weeks.

Choose from the following Custom Transfer Tank types:

  • Rectangular
  • L Shaped
  • Wedge


The diesel ATI 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.

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. 

All ATI custom 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.

Other Custom Tank Options:

Can I use your refueling transfer tanks for gasoline legally?

Yes, ATI manufactures aluminum refueling transfer tanks to meet and exceed the requirements for gasoline, kerosene, methanol, and diesel. In fact, many government agencies are currently using ATI refueling tanks.

Can I pump from your refueling tank without removing it from the bed of my truck?

Yes it is legal to pump from ATI transfer tanks while still in the bed of a truck whether the tank is being used for private, state, or commercial use.

Do all of your fuel tanks have baffles inside?

Yes, all ATI tanks are baffled to provide strength and support and to reduce fuel sloshing.

Are your tanks tested for leaks?

Yes, all of our tanks are visually inspected and pressure tested for leaks. We also use a video inspection system to check for penetration on the inside of the tank.

Do your fuel tanks come with a warranty?

Yes, all ATI standard duty tanks and toolboxes come with a one year limited warranty. The Severe Series tanks come with a 5 year limited warranty.

Do I need to ground my fuel tanks to the vehicle?

Yes, the tanks need to be grounded at all times. When you install the fuel tank remove the paint from the underside of the truck bed where the tank gets bolted in. That will give a sufficient ground.

How Do I mount my fuel tank?

The fuel tank will come with mounting tabs welded to the tank. You will place the tank in the desired location, check for clearance underneath so you don’t drill into brake lines, fuel lines, etc. Drill and install one bolt, flat washer, lock washer , and nut. Tighten securely. Note: after drilling your mounting hole sand off any paint to bare metal on the bottom side of the truck bed around the bolt hole to ensure a good ground.

Can I get a black powder coat as an option on my fuel tank?

Yes, we offer powder coat as an option. Our durable powder coat fuel tanks are very popular. Our standard color is gloss black but we also offer textures and many other colors.

Can I get a fuel level gauge?

es, fuel gauges are available as an option for all of our auxiliary fuel tanks and refueling tanks.

All custom ATI tanks include a custom drawing that shows the customer requested fuel capacity and requested dimensions.

The ATI custom tank drawings will be sent to customers by email after purchasing the finalized custom tank quote.

Customers may make as many revisions as needed to the custom tank drawing before finalizing the dimensions.

After finalizing the custom tank drawing, your custom tank will be placed into production.

Custom tank orders are non-refundable.

Aluminum Tank Industries, Inc. warrants all products to be free of defects in material or workmanship for a period of 1 year from invoice ship date from our warehouse or purchase date if registered. Severe Series refueling tanks are covered for 5 years. If upon our inspection we deem the item to be defective, Aluminum Tank Industries, Inc. will determine whether to repair or replace the defective item.  It is the customers’ responsibility to ship the item to Aluminum Tank Industries, Inc. No cost for labor, installation, or missing contents will be reimbursed. Damages due to shipping and handling, improper installation, abuse – intentional or accidental, or normal wear and tear are not covered by this warranty. Warranty is void if the tank has been altered. Standard duty tanks are designed for use with transfer pumps up to 30 lbs. Installing a pump over 30 lbs on a standard duty tank will void warranty. A Severe Series tank is required if using a transfer pump over 30 lbs.