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Part #: AO11803

Aeromotive 11803 Fuel System (Retro-Fit Kit For 1/2" Lines)

2001-2010 GM 6.6L Duramax
Part #: AO11803
$ $1,363.47
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The Aeromotive 11803 Fuel System offers a true solution to any 2001-2010 GM 6.6L Duramax owner looking to upgrade the fuel system on their truck. Built to be more reliable, more efficient, and more advanced than other products on the market, the Aeromotive Fuel System addresses the common failure points and issues that have plagued the market for years.

The Aeromotive Fuel System separates air and debris to provide your engine with the cleanest fuel. This kit comes standard with one of the best filters on the market, the CATERPILLAR 1R-750. Because the pump was designed with a standard 1"-14 thread, it can fit a wide range of aftermarket filters so cross-referencing or changing filters is never an issue.

Shaft Seals & Pump Design:
Like all Aeromotive In-Line Pumps, the Aeromotive Diesel Fuel System features a flow-through design. This means that fuel actually flows across the motor, because of this, there's no shaft seal to fail which increases reliability and durability of the pump.

Extreme Climates:
Aeromotive understands that some need their trucks in harsh environments. For the extreme cold, the Aeromotive 11803 features (2) 8-AN ports to allow engine coolant to warm the pump body. In addition, the pump is a completely sealed unit allowing it to get wet or be submerged without skipping a beat.

Aeromotive has worked hard to provide an easy installation for this fuel system. Featuring high-quality Delphi sealed weatherpack connectors, the plug and play wiring harness provides power to the pump with 10-gauge power and ground wires. Aeromotive includes a steel zinc-plated bracket, hoses, pickup tube and all the components needed to complete this installation on your Duramax pickup.

Fuel Delivery:
Aeromotive has addressed the 1/4 tank issues associated with aftermarket draw straws by including their patented and proven foam baffle technology borrowed from their Phantom systems. This baffle keeps fuel at the pickup point of the 3/4" draw straw and houses the 100 micron pre-filter and return line. By doing this, there is no need to drill a hole in the bottom of the tank or modify the filler neck.

Fuel Pressure:
Unlike other diesel lift pumps, Aeromotive chose to use a spring and diaphragm design for precise pressure control. The design provides more control over exact system pressures. The 11803 also comes standard with a pump mounted gauge so you can refine your pressure tuning without having to guess.


  • 130 GPH
  • Self-Priming
  • Retro-Fit Kit, Replaces Existing Fuel Pump
  • In-Tank Baffle - Eliminates 1/4 Tank Issues

Note: The 11803 Retro-Fit Kit is for use in applications where your current aftermarket fuel system with 1/2" lines is being replaced with the Aeromotive pump.


  • MFG. Number 11803
  • Manufacturer Name Aeromotive
  • Shipping Weight 30.00 lb.
  • Shipping Length 14 in.
  • Shipping Width 14 in.
  • Shipping Height 6 in.
  • UPC 684980007701
  • Warranty Yes
  • Warranty Info 1 Year
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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Most Popular Questions

Will this work on my stock 2002 Duramax? I am looking to upgrade my fuel system, the only option I saw is this kit
View Staff Answer 

The AEROMOTIVE 11803 FUEL SYSTEM (RETRO-FIT KIT FOR 1/2" LINES) is a fuel pump/fuel system for all 2001-2010 GM 6.6L Duramax vehicles. The system will NOT include the ½” fuel line required for installation.