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Home > AirDog > AirDog II 4G > AirDog GM Duramax AirDog II 4G
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AirDog GM Diesel AirDog II 4G

AirDog II-4G for GM Diesel

AirDog II-4G Removes Entrained Air/Vapor From GM Duramax Diesel Fuel Improving Engine Performance 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 for your GM Duramax. 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
  • 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.

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ff100-2 (2 micron fuel filter) ws-100 (water separator filter) pressure tee        
FF100-2 (2 Micron
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WS-100 (Water Separator Filter)(steel petcocks): Pressure Tee    
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Our PN# MFG. PN# AirDog II 4G GM Duramax Applications
PFTA6SABC108 A6SABC108 AirDog II-4G A6SABC108 DF-165-4G Air/Fuel Separation System
1992-2000 GM 6.5L (Moderate To Extreme)
PFTAA6SABC111 A6SABC111 AirDog II-4G A6SABC108 DF-200-4G Air/Fuel Separation System
1992-2000 GM 6.5L (Moderate To Extreme)
PFTA6SPBC258 A6SPBC258 AirDog II-4G A6SPBC258 DF-100-4G Air/Fuel Separation System
1992-2000 GM 6.5L (Stock To Moderate)
PFTA6SABC409 A6SABC409 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Duramax DF-165-4G Preset@8psi
PFTAA6SABC112 A6SABC112 AirDog II-4G A6SABC112 DF-200-4G Air/Fuel Separation System
2001-2010 GM 6.6L Duramax (Extreme Applications)
PFTA6SPBC259 A6SPBC259 AirDog II-4G A6SPBC259 DF-100-4G Air/Fuel Separation System
2001-2010 GM 6.6L Duramax (Stock To Moderate)
PFTA6SPBC260 A6SPBC260 AirDog II-4G A6SPBC260 DF-100-4G Air/Fuel Separation System
2011-2014 GM 6.6L Duramax LML (Stock To Moderate)
PFTA6SABC410 A6SABC410 2011, 2012, 2013, 2014 Duramax DF-165-4G Preset@8psi
PFTA6SABC114 A6SABC114 AirDog II-4G A6SABC114 DF-200-4G Air/Fuel Separation System
2011-2014 GM 6.6L Duramax LML (Extreme Applications)
PFTA6SPBC262 A6SPBC262 AirDog II-4G A6SPBC262 DF-100-4G Air/Fuel Separation System
2015-2016 GM 6.6L Duramax LML (Stock To Moderate)
PFTA6SABC413 A6SABC413 2015-2016Duramax
DF-165-4G Preset@8psi
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