
- Water Separation: Fuel passes through 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.
- 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 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.

When you begin to modify your 2015-2016 GM 6.6L Duramax LML, the stock fuel system can quickly become a weak point. The AirDog A4SPBC190 FP-100-4G Air/Fuel Separation System is the perfect solution for stock to moderately modified engines. As fuel flow increases, it can introduce damaging air and vapor into your system. This not only robs your engine of performance but can also lead to permanent damage to your injectors, causing issues like 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, pulling fuel from your tank and putting it through a multi-stage process:
Water Separation: Fuel passes through 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.
- Water Separation: Fuel passes through 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.
- 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 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.