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Part #: TFT4010201

Titan 4010201 Spare Tire Auxiliary Fuel System

2001-2010 GM 6.6L Duramax
Part #: TFT4010201
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The Titan 4010201 Spare Tire Auxiliary Fuel System (STAFS) puts an additional 30 gallons of fuel at your fingertips. In most cases, this can even double the fuel capacity of your truck! This innovative system is designed to repurpose the space commonly used to stow a vehicles spare tire. Its underbody location means that it has no impact on the truck bed's hauling space. In many cases where aftermarket custom wheels and tires are installed on a vehicle, they are not the same size as standard which means the original equipment space cannot be used anyway.

The STAFS military-grade cross-linked polyethylene tank body is light at only 30-pounds making it easy for one person to install. This kit includes all mounting hardware, filler kit and electronic fuel transfer monitor and control unit which is operated from the comfort of the cab. The electronic system gives the vehicle operator total flexibility in managing how the extra fuel capacity is used. The fuel can be held in reserve or transferred on-the-go as the need arises. The illuminated user interface indicates the tank's fuel level and features a single-touch button that starts the fuel transfer sequence. With one touch, fuel transfers from the STAFS to tank to the vehicles primary fuel tank and continues to flow until it is automatically stopped by the controller or the button is touched again.

The Titan system comes with a universal filler kit featuring an attractive brushed aluminum door that can be installed on the vehicle's exterior sidewall or on an inside wall of the truck bed. All of the mounting brackets, hoses, valves and pump are included with each system. Lifetime warranty on tank. 

  • 30-Gallon Capacity
  • Repurposes Spare Tire Space
  • Transfers Fuel From STAFS To Factory Tank


  • MFG. Number4010201
  • Manufacturer NameTitan Fuel Tanks
  • Weight70.00 lb.
  • Height32 in.
  • Width36 in.
  • Length19 in.


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Most Popular Questions

Will this tank work with the titan 62 gallon aftermarket fuel tank??
View Staff Answer 

The Titan Spare Tire Auxiliary Fuel System can be used to transfer fuel to the factory fuel tank or any of the Titan mid-ship replacement tanks.

How do you fill this tank once installed?
View Staff Answer 
The tank gets filled through the fuel fill neck supplied in the kit. In the video in the product description above, you can see they drill a hole in the bed and install the second fuel door right on the outside of the bed. In the event you didn't want it mounted outside the truck, you can also mount it inside the bed. The views of this start at about 17:30 in the video.