
- Water Separation: First, the fuel enters a water separator, which 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.
- 150 GPH Fuel Pump: Provides the robust fuel flow needed for highly modified engines.
- Removes Air & Water: Protects your injectors and other fuel system components from long-term damage.
- Increases Overall Engine Efficiency: Leads to improved throttle response and 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 peace of mind.
- Complete Kit: Comes with all the necessary plumbing, hardware, wiring, and mounting brackets for a straightforward installation.

For 2001-2010 GM 6.6L Duramax owners with moderately to extremely modified engines, the AirDog A4SPBC188 FP-150-4G Air/Fuel Separation System is the ultimate upgrade. As you push your diesel's performance with larger turbos and more aggressive tuning, the demand for consistent, clean fuel becomes critical. Higher fuel flows can introduce air and vapor into the system, which not only robs your engine of power but can also cause permanent damage like pitting, galling, and tip erosion in your injectors. The AirDog system actively removes these destructive contaminants, ensuring your engine performs at its absolute best while protecting its most vital and expensive components.
How It Works
The AirDog operates as a complete lift pump and filtration system, pulling fuel from your tank and putting it through a multi-stage process:
Water Separation: First, the fuel enters a water separator, which 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 part[...]
- Water Separation: First, the fuel enters a water separator, which 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.
- 150 GPH Fuel Pump: Provides the robust fuel flow needed for highly modified engines.
- Removes Air & Water: Protects your injectors and other fuel system components from long-term damage.
- Increases Overall Engine Efficiency: Leads to improved throttle response and 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 peace of mind.
- Complete Kit: Comes with all the necessary plumbing, hardware, wiring, and mounting brackets for a straightforward installation.