The PureFlow AirDog II-4G A6SABD425 DF-165-4G Air/Fuel Separation System for your 1998.5-2004 Dodge 5.9L Cummins 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 increas