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AIRDOG II-4G '99-03 7.3L Air/Fuel Separation System - A6SABF492

Improve your Powerstroke Diesel performance! The patented AirDog® Air/Fuel Separation System maintains correct injection-timing and eliminates spray-pattern disruption while allowing full power stroke and complete burn. This pump will work with the 94.5-97 model year trucks with some added modifications. You will have to remove the switching valve if you have dual tanks as the switch valve cannot handle the higher fuel pressure. (NOTE: many OBS owners will typically install the fullsize Bronco rear tank (38gal) and eliminate the midship OEM tank) We also highly recommend a large draw straw or a sump to help with pump longevity.
Pricing: $765.00

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AirDog® II-4G Installation Kit

 All-Inclusive Installation Kit contains:

  • Relay Control Wiring Harness
  • Fuel Module Up-Grade (when required)
  • All Fuel Fittings Required
  • Mounting Hardware
  • 1/2? Fuel Lines W/ OEM Style Quick Connect Fittings
  • AirDog® II-4G Bracket & Spacer
  • Plastic Ties
  • Installation Manual Installation guide here: INSTALLATION MANUAL

AirDog Demonstration Stand



Demand Flow Technology

AirDog® II-4G Fuel Air Separation System

Designed to operate under flow and pressure conditions beyond the max parameters of your diesel engine, this patented device filters particulate contaminants and power-robbing air/vapor. Through the positive fuel air separation features of the patented AirDog® II-4G the separated air/vapor is discharged from the filter and back to the fuel tank (through the primary air/vapor discharge port). Excess fuel not needed by the engine during the fuel-cycle is re-captured internally through the pressure regulator back to the water separator.


Model: A6SABF492 DF-165-4G | Includes: AirDog® II-4G Installation Kit | Powerstroke: 1999-2003

Benefits of the AirDog® II-4G:

  • Increased Fuel Economy
  • Increased Power Output
  • Increased Torque Output
  • Longer Injector Life
  • Improved Throttle Response
  • Optimized Engine Performance

Brilliantly compensates for compression-loss (power) in diesel engines operating at high altitude.

AirDog® II-4G Features

  • Preset @ 50-55 PSI
  • Supports 500HP-800HP
  • Flows 165 Gallons Per Hour
  • Improved Throttle Response
  • Smoother Idle & Acceleration
  • Dual Feed Gerotor Pump
  • Low amperage motor provides efficiency and endurance
  • Self-aligning motor requires less maintenance and reduces noise levels
  • Intermediate pump shaft seperates motor from fuel
  • Small & Compact: ONLY 7L X 10T X 3.2W


Shipping Information

  • Item Requires Shipping
  • 27.0 lbs.
  • W13.0000” x H7.0000” x L19.0000”
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Customer Reviews

Comment Total Reviews (1)

2000 F250 7.3 Powerstroke
  • Currently 5/5 Stars

Reviewed by:

Product ownership: Less than 3 months

Purchased from: CNC Fabrication, LLC

I am very pleased with my purchase. I am pleased with my experience dealing with CNC. I did a full fuel system build along with this pump so the install took a while, but overall it went very smoothly. So far the airdog is performing flawlessly. Install video at Living On Wheels channel

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