The ATI aluminum diamond plate auxiliary tank transfers diesel fuel from your auxiliary tank directly into your diesel truck’s fuel tank.  Auxiliary tanks range in size from 30 gallons to 46 gallons.
ATI auxiliary tanks are used to increase driving range and fuel capacity by connecting directly into your factory fuel tank through the factory filler neck.  Fuel transfers from the auxiliary tank based on a gravity feed connection.
*Diesel auxiliary tanks are designed for use with gas trucks.
Choose from the Following Options :

Auxiliary Tank only : auxiliary tank with no gravity feed fuel install kit.
Auxiliary Tank + Fuel Shotz gravity feed fuel install 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.
Optional Tank Accessories :

Tank mounted gauge : mounts on the top of the tank.

Black powder coat : gloss black or matte black.

Locking fuel cap : provides extra security with a lockable cap.

Tank Sending & Gauge : monitor tank fuel levels from a gauge mounted on your truck dashboard.

Mounting Bolts : includes bolts, washers and nuts to securely mount the tank in your truck bed.

Fuel Shotz Kit
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 via the factory filler. 
Once connected, your factory tank will remain 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

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

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

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

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