
- Water Separation: First, fuel enters a water separator that removes all water and large particulate contaminants.
- Fuel Pump: The fuel then reaches the pump, which pressurizes it for the next stage.
- Filtration: Under positive pressure, the fuel flows through a filter that traps any remaining minute particles.
- Air/Vapor Removal: Simultaneously, any entrained air and vapor are separated from the fuel and returned to the tank.
- 100 GPH Fuel Pump: Provides the robust fuel flow required for your stock or moderately modified engine.
- Removes Air & Water: Protects your injectors and other fuel system components from long-term damage.
- Increases Engine Efficiency: Leads to improved throttle response and overall optimized engine performance.
- Reliable 4G Motor Design: This proven motor ensures a long-lasting, budget-friendly solution.
- Lifetime Limited Warranty: AirDog stands behind this product with a comprehensive limited lifetime warranty for complete peace of mind.
- Complete Kit: Comes with all the necessary plumbing, hardware, wiring, and mounting brackets for a straightforward installation.

As you enhance the performance of your 2011-2014 GM 6.6L Duramax LML, your fuel system needs to keep up. The AirDog A4SPBC186 FP-100-4G Air/Fuel Separation System is designed to do just that for stock to moderately modified engines. Increased fuel flow can lead to more air and vapor entering your system, which not only lowers engine performance but can also cause permanent damage to your injectors, such as pitting and galling. The AirDog actively removes this damaging air and vapor, ensuring your engine gets the clean, consistent fuel supply it needs to perform at its peak while protecting its most vital components.
How It Works
The AirDog operates as a comprehensive lift pump and filtration system, pulling fuel from your tank and putting it through a multi-stage process:
Water Separation: First, fuel enters a water separator that removes all water and large particulate contaminants.
Fuel Pump: The fuel then reaches the pump, which pressurizes it for the next stage.
Filtration: Under positive pressure, the fuel flows through a filter that traps any remaining minute particles.
Air/Vapor Removal: Simultaneously, an[...]
- Water Separation: First, fuel enters a water separator that removes all water and large particulate contaminants.
- Fuel Pump: The fuel then reaches the pump, which pressurizes it for the next stage.
- Filtration: Under positive pressure, the fuel flows through a filter that traps any remaining minute particles.
- Air/Vapor Removal: Simultaneously, any entrained air and vapor are separated from the fuel and returned to the tank.
- 100 GPH Fuel Pump: Provides the robust fuel flow required for your stock or moderately modified engine.
- Removes Air & Water: Protects your injectors and other fuel system components from long-term damage.
- Increases Engine Efficiency: Leads to improved throttle response and overall optimized engine performance.
- Reliable 4G Motor Design: This proven motor ensures a long-lasting, budget-friendly solution.
- Lifetime Limited Warranty: AirDog stands behind this product with a comprehensive limited lifetime warranty for complete peace of mind.
- Complete Kit: Comes with all the necessary plumbing, hardware, wiring, and mounting brackets for a straightforward installation.