Titan Fuel Tanks Spare Tire Auxiliary Fuel System

2003–2012 Dodge/RAM 2500/3500 Diesel Trucks with Cummins Engines

Part #: 4030203

Overview

The Titan Fuel Tanks Spare Tire Auxiliary Fuel System (STAFS) is a smart, efficient solution designed to significantly increase the fuel capacity of Dodge and RAM 2500 and 3500 diesel trucks from 2003 to 2012. By utilizing the space traditionally reserved for the spare tire, this system adds an additional 30 gallons of fuel, often doubling the vehicle’s range without compromising bed space or hauling capability. Ideal for diesel truck owners who demand extended driving range for work, travel, or off-road adventures, the STAFS offers convenience and peace of mind with its integrated electronic monitoring and control system.

Specifically engineered for Dodge and RAM 2500 and 3500 models equipped with Cummins diesel engines, this auxiliary fuel system is a practical upgrade that enhances fuel management flexibility while maintaining the truck’s rugged utility.

Key Features

The Titan STAFS combines innovative design with user-friendly technology to deliver a reliable auxiliary fuel solution:

• 30-gallon capacity auxiliary fuel tank that fits in the spare tire well
• Compatible with 2003–2007 Dodge Ram 2500/3500 5.9L Diesel and 2008–2012 Ram 2500/3500 6.7L Diesel models
• Military-grade cross-linked polyethylene tank construction for durability and lightweight handling (approx. 30 lbs)
• Electronic fuel transfer monitor and control unit with illuminated interface, operated conveniently from inside the cab
• Single-touch fuel transfer activation with automatic shutoff or manual control
• Universal filler kit with brushed aluminum door, installable on vehicle sidewall or truck bed interior
• Underbody installation preserves truck bed space for hauling
• Includes all necessary mounting brackets, hoses, valves, and pump for a complete system
• Lifetime warranty for long-term peace of mind
• Designed for vehicles equipped with heavy Class V (5) hitches, standard on most full-sized diesel pickups

Construction & Design

The STAFS tank is crafted from military-grade cross-linked polyethylene, a material known for its exceptional strength, chemical resistance, and lightweight properties. Weighing only about 30 pounds, the tank is easy to handle during installation yet robust enough to withstand harsh road conditions and exposure to the elements. The system’s underbody mounting design cleverly repurposes the spare tire well, eliminating any impact on the truck bed’s cargo capacity.

The universal filler kit features a sleek brushed aluminum door that can be mounted on the vehicle’s exterior sidewall or inside the truck bed, providing flexible installation options to suit different preferences and vehicle configurations. All components, including hoses, valves, and the fuel pump, are engineered for seamless integration and reliable operation.

Installation & Fitment

Installation of the Titan STAFS is designed to be straightforward for professional installers familiar with diesel truck fuel systems. The system mounts securely in the spare tire well beneath the vehicle, requiring no modification to the truck bed or frame. It is essential that the vehicle is equipped with a heavy Class V (5) hitch, which is standard on most full-sized diesel pickups, to support the system’s weight and mounting requirements.

The electronic fuel transfer monitor and control unit installs inside the cab, allowing the driver to monitor fuel levels and control fuel transfer with ease. The universal filler kit offers flexible placement options to accommodate different vehicle layouts and user preferences.

What's Included

• 30-gallon cross-linked polyethylene auxiliary fuel tank
• Mounting hardware and brackets
• Universal filler kit with brushed aluminum door
• Fuel transfer pump and valves
• Electronic fuel transfer monitor and control unit with illuminated interface
• All necessary hoses and fittings for installation

Ideal For

The Titan Spare Tire Auxiliary Fuel System is perfect for diesel truck owners who require extended driving range without sacrificing cargo space. It is especially beneficial for:

• Long-haul drivers and commercial fleets seeking fewer fuel stops
• Off-road enthusiasts and overlanders needing reliable extra fuel capacity
• Work trucks operating in remote areas with limited fueling options
• Owners of Dodge and RAM 2500/3500 diesel trucks from 2003 to 2012 looking for a factory-quality auxiliary fuel solution

Titan Fuel Tanks manufactures durable high-capacity replacement fuel tanks designed to extend range for trucks and work/tow vehicles. Built from heavy-duty materials and aimed at real-world use, Titan tanks are a popular upgrade for overland builds, long-haul towing, and performance trucks that need more fuel capacity for the miles ahead.