
- Water Separation: First, fuel passes through a water separator, which removes all water and large particle 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.
- 150 GPH Fuel Pump: Provides the robust fuel flow required for highly modified engines.
- Separates Air & Water: Protects your injectors and other fuel system components from long-term damage.
- Increases Engine Efficiency: Leads to a faster throttle response and overall better engine performance.
- Reliable 4G Motor Design: This proven motor ensures a long-lasting, cost-effective 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.

For owners of a moderately to extremely modified 2011-2014 GM 6.6L Duramax LML, a stock fuel system simply can't keep up. The AirDog A4SPBC189 FP-150-4G Air/Fuel Separation System is the perfect upgrade. When you increase your engine's performance, the higher fuel flow can introduce damaging air and vapor into the system. This not only hurts performance but can also permanently damage your injectors through galling, pitting, and tip erosion. The AirDog system actively removes these contaminants, 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 functions as a complete lift pump and filtration system, putting fuel from your tank through a multi-stage process:
Water Separation: First, fuel passes through a water separator, which removes all water and large particle 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, a[...]
- Water Separation: First, fuel passes through a water separator, which removes all water and large particle 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.
- 150 GPH Fuel Pump: Provides the robust fuel flow required for highly modified engines.
- Separates Air & Water: Protects your injectors and other fuel system components from long-term damage.
- Increases Engine Efficiency: Leads to a faster throttle response and overall better engine performance.
- Reliable 4G Motor Design: This proven motor ensures a long-lasting, cost-effective 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.