The AirDog II-4G 165 GPH A6SABD340 lift pump, or Fuel Preporator, is a must have upgrade for your Dodge Ram 1989-1993 12V 5.9L Cummins. The fuel system on a Cummins 12V diesel truck is the heart of the vehicle’s performance and reliability. This low pressure (10-13psi) Cummins lift pump mounts to the inner frame rail using the supplied sandwich plate mounting system. The suction/fuel supply side connects to the supplied Fuel Module Upgrade Kit installed in the tank. The pressure side connects directly to the side of the VE-44 injection pump bypassing the factory block mounted mechanical pump and fuel filter housing.  This pump can be used with a fuel tank sump (DRX09SMP) to solve the Dodge 1/4 tank suction issue.


The AirDog 2 4G DF-165 will solve infamous P0087 & P1093 low fuel rail pressure codes. This positive supply 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 resulting 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)


This 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 1,000 RWHP! See How To Choose A Lift Pump. Backed by a lifetime warranty.


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 we made the installation 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. Our step-by-step manual outlines each process of the installation and is accompanied by visual guides to aid your progress.

All-Inclusive Installation Kit Includes:

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

Additional information

Weight27 lbs
Dimensions19 × 13 × 7 in


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