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08-10 Ford 6.4L Powerstroke Airdog 2 4G 165GPH Lift Pump

AirDog® II-4G *Replaces OE lift pump

The next generation in the fuel delivery system.

The AirDog 2-4G A6SABF494 Air/Fuel Separation System for your 2008-2010 Ford 6.4L Powerstroke Twin-Turbo Diesel is the next generation Airdog fuel delivery system, resulting in an efficient, long lasting and quiet lift pump. The compact AirDog II-4G provides the most advanced technology designed specifically for diesel pickups to remove water, vapor, particulates and entrained air from diesel fuel, all while increasing performance, power, and fuel economy. 

The new design of the patented AirDog II-4G features many innovative improvements for increased pump performance. This results in less noise and less maintenance. The AirDog 2-4G features an intermediate pump shaft that moves the electric motor away from the fuel, effectively isolating it. This eliminates any potential for “wet motors” due to a damaged or leaking seal. The motor’s capability to self-align requires less maintenance and increases the systems endurance, resulting in a longer pump life. The low amperage motor also provides a significant reduction in noise, and longer drivability. 

AirDog® is proud to announce that the AirDog II-4G® is the quietest fuel system in the diesel market! 


  • Preset @10 PSI 
  • Supports 500HP-800HP 
  • Flows 165 GPH
  • Smoother Idle & Acceleration 
  • Improved Throttle Response 

Advancing the AirDog® Tradition with the 4th Generation Fuel System!

The AirDog® II-4G system improves engine performance by:

  • Maintaining Correct Injection Timing

  • Eliminating Spray Pattern Disruption

  • Allowing for a Full Power Stroke and Complete Burn

Benefits of the AirDog® II-4G:

  • Increased Fuel Economy

  • Increased Power Output

  • Increased Torque Output

  • Longer Injector Life

  • Improved Throttle Response

  • Reduced Exhaust Emissions

  • Optimized Engine Performance

AirDog® II-4G also overcomes loss of power for diesel engines operating at higher altitudes.

AirDog® II-4G Features

  • 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 7″L X 10″T X 3.2″W

AirDog® II-4G Installation Kit

All-Inclusive Installation Kit includes:

  • 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

AirDog® II-4G Fuel Air Separation System featuring Demand Flow Technology and Enhanced Features

AirDog® II-4G is designed to operate at flows and pressures beyond the maximum requirements of the engine. It receives fuel under vacuum from the fuel tank containing entrained air/vapor, particulate contaminates and unknown quantities of water.

The fuel passes through the water separator which removes the large particulate contaminates that could damage or jam the gear rotor fuel pump. The fuel, with only entrained air/vapor and tiny particulate contaminates remaining enters the fuel pump.

The fuel, now under positive pressure flow, enters the fuel filter. As the fuel passes through the filter media and the remaining particulate contaminates are caught and contained, the entrained air/vapor is also separated. 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.

The fuel passing through the filter media is now free of contaminates and power robbing air/vapor. At pressures and flows able to meet the needs of the engine, it exits the fuel filter through two passageways. First, the fuel for the engine passes into the fuel pickup tube and on to the engine. Then, the excess fuel not needed by the engine recycles internally through the pressure regulator back to the water separator.

Airdog part number: A6SABF494

DF-165-4G 2008-2010 6.4L POWERSTROKE (Preset @10psi)
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