05-18 Dodge AirDog II 4G

Thoroughbred Sku #: PFT0517DGII4G

$755.00 - $799.00


Add a Sump?

Add a Fleece Fuel Filter Delete?

Product Details

Product Name: AirDog II 4G
Manufacturer: Airdog
Fitment Notes: 2005-2018 Dodge Cummins

The next generation in the fuel delivery system.

The patented AirDog II 4G has been quality engineered to remove entrained air and water vapor from diesel fuel. The result is a compact, long lasting, efficient, and quiet fuel system made with superior quality.

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
  • 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.


  • What is the sump?

    John | 12/2/2020

    The sump kit, is designed, to draw fuel, from the bottom of the fuel tank.

  • If I daily drive my stock truck will running an AirDog 150 or AirDog II 165 4G hurt anything?

    Brad Smith | 5/22/2019

    No, it will not hurt anything. With the Original AirDog’s High Flow return all excessive fuel not being used by your truck will be returned to the tank. When running the AirDog II 4G the Demand flow only allows the pump to send what fuel is needed to the injection pump, and all other fuel is recirculated internally in the base returning it to the suction side of the pump.

  • What is the difference between and Original AirDog and AirDog II 4G?

    Austin Davis | 5/22/2019

    The AirDog II 4G aside from having the adjustable regulator, the pump and base assembly are designed different internally. The pump assembly has a Dual Inlet design allowing more fuel to flow into the Gerotor, this allows the pump to increase volume without having to work any harder. The base on the AirDog II is also much different. Internally the fuel is redirected through passageways after being pressurized, this allows less fuel to be returned to the tank and more fuel to be held in the filters for a true “On Demand” system. An intermediate shaft was also incorporated to completely separate the electric motor from fuel path along with an additional two bearings to reduce drag and increase reliability and lifespan of the AirDog II 4G

  • What kits will require dropping the tank or installing a suction tube?

    Bob Turner | 5/22/2019

    All Original AirDog 150, AirDog II 200 Systems and AirDog II 165 Dodge Systems. Any truck that is equipped with an in tank fuel pump will require a suction tube or module upgrade kit

  • What AirDog pump do I need for my truck?

    Dennis Schwartz | 5/22/2019

    Original AirDog and AirDog II 100 units are recommended for up to 500 horsepower. Original AirDog 150 and AirDog II 165 units are recommended for horsepower up to 1000. AirDog ® II 200 units are recommended for anything that exceeds 1000 horsepower.

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