The AirDog II 4G 165GPH A6SABC108 Air/Fuel Separation lift pump, or Fuel Preporator, by Pureflow Technologies is a must have upgrade for your 1992-2000 6.5L GM Diesel. The fuel system on your diesel truck is the heart of the vehicle’s performance and reliability. This low pressure (8-10 psi) GM 6.5L Diesel lift pump mounts to the inner frame rail using the supplied sandwich plate mounting system.  The suction/fuel supply sides hook directly up to the factory suction line quick disconnect fittings. The pressure side connects to the factory injection pump feed line bypassing the factory frame rail mounted pump, making the install very straight forward.


Over the life of your diesel pickup truck there may be unnecessary stress on your fuel system. High mileage and/or additional performance modifications such as a tuner or oversized injectors can weaken your injection pump in a shorter amount of time than with the stock fuel system. This may result in a drop in performance, reliability, and fuel economy.  Installing an AirDog II-4G lift pump will strengthen, protect, and in most cases extend the life of the fuel system and related parts. The supplied fuel filter (FF100-2) and water separator (WS100) filter your fuel down to a 2 micron rating, which surpasses the stock fuel filters filtration capability.  The AirDog II-4G also helps by eliminating spray pattern disruption from air entering the diesel fuel system. The result is overall increased engine efficiency by keeping the injection timing where it should be thus allowing a more complete burn of the fuel entering the cylinder. (see How It Works)


The AirDog II 4G 165GPH will solve the 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.


This AirDog II 4G 165GPH is recommended for GM diesel 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! Backed by a lifetime warranty.  (see How To Choose A Lift Pump)


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.

All-Inclusive Installation Kit Includes:
  • Relay Control Wiring Harness
  • All required Fuel Fittings
  • 1/2″ Fuel Line
  • Mounting Brackets and Hardware
  • Installation Manual

Additional information

Weight 27 lbs
Dimensions 19 × 13 × 7 in


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