ATI aluminum diesel L-shaped auxiliary fuel tanks are designed to work with a crossover style toolbox or chest box. The bottom of the L-shape fits under most standard toolboxes. The L-shape also allows for clearance in most 5th wheel applications.
ATI diesel auxiliary tanks are used to increase driving range and fuel capacity by connecting directly into your factory fuel tank through the factory filler neck using the ATI Fuel Shotz system. 
ATI L-Shaped Auxiliary Tank Size :

80 gallon   – 48.5 inches long by 28 inches wide by 26 inches high 

*The fill neck adds 2.5 inches of height to the top of the tank and the mounting tabs add 1.5 inches to the side and front of the tank.

See all   ATI Auxiliary Tank   options to compare all ATI tank sizes available.

ATI FUEL SHOTZ (available as product add-on)
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. 
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 diesel auxiliary tanks come standard with the following:

Meets DOT requirements for diesel auxiliary.

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.