The PureFlow AirDog II-4G Air/Fuel Separation System is the next generation in the fuel delivery system, resulting in a long-lasting, efficient and quiet lift pump. The compact AirDog II-4G provides the most effective technology designed specifically for diesel pickups to remove water, particulates, vapor and entrained air from diesel fuel, all while increasing power and performance.

AirDog® is proud to announce that the AirDog II-4G® is the quietest fuel system in the diesel market!


  • Preset @ 10 PSI
  • Supports Stock - 500HP
  • Flows 100 Gallons Per Hour
  • Improved Throttle Response
  • Smoother Idle & Acceleration

LEGAL for use in California.