Benefits of the 4G Fuel System:

  • Improved Throttle Response
  • Longer Injection System Life
  • Increased Power and Torque
  • Reduced Exhaust Emissions
  • Higher than Stock Flow Rates in Some Models
  • Adjustable Fuel Pressure Regulator
  • Quiet and Smooth Pump Operation
  • Unlike many competitors and older AirDog products, the 4G offers features to make it more durable than any other brushed DC motor system on the market!

AirDog II-4G Installation for Any Skill Level

The installation of any AirDog/Raptor system has been designed with the customer in mind. We know not everyone has special tools or fabrication skills, so the installation was made as easy as possible with basic hand tools and the, occasional, power drill. The quick-connect fittings and fuel lines make this a true plug and go installation, reducing the overall installation time. The step-by-step manual outlines each process of the installation and is accompanied by visual guides to aid your progress.

Includes:

  • Relay Control Wiring Harness
  • All required Fuel Fittings
  • 1/2″ Fuel Line
  • Mounting Brackets and Hardware
  • Installation Manual
  • Fuel Module Upgrade


​The AirDog II 4G 165 GPH A6SABD425 lift pump, or Fuel Preporator, is a must have upgrade for your 1998.5-2004 24V 5.9L Cummins. The fuel system on your diesel truck is the heart of the vehicle’s performance and reliability. This low pressure (15-17 psi) Cummins lift pump mounts to the inner frame rail using the supplied sandwich plate mounting system. The suction/fuel supply side hooks directly up to the supplied Fuel Module Upgrade Kit.  The pressure side line connects directly to the side of the VP44 or CP3 injection pump. The air/vapor return is sent back to the tank through the factory 3/8” suction line once the module is modified. This kit will bypass the block mounted (98.5-02), in-tank (98.5-02) or frame rail mounted (03-04.5) stock pump and factory fuel housing. This lift pump can be used in conjunction with a fuel tank sump (DRX09SMP). 

The AirDog 2 4G DF-165 Cummins lift pump will solve infamous P0087 & P1093 low fuel rail pressure codes.  The positive pressure of purified fuel being fed to your injection pump will also add performance, throttle response, and longevity to your vehicle. Due to extra stress on your fuel system from either high mileage and/or additional performance modifications, like a tuner or larger injectors, your injection pump can become weak over time. This may result in a drop of performance, reliability, and fuel economy. The supplied water separator (WS100) and fuel filter (FF100-2), that mount to the pump, filter your fuel down to a 2 micron rating which surpasses the stock fuel filters filtration capability. (see How It Works)

The AirDog II 4G 165GPH Cummins lift pump is recommended for trucks that have a stock to aggressively upgraded fuel system (meaning stock to larger injectors and injection pump; will also support aggressive tuning). Perfect fit for daily drivers to performance applications reaching up to 1000 RWHP. Backed by a lifetime warranty. (see How To Choose A Lift Pump)

Brand: AirDog

  • 1998-2004 Dodge Ram
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