This is the AirDog II-4G DF-165 fuel system for the 1992-2000 Chevy 6.5L Diesel. This fuel system replaces your factory low pressure frame rail mounted pump. This system mounts to the frame rail using the supplied sandwich plate mounting system. The suction side hooks up to the factory suction line. The pressure side connects directly to the factory injection pump feed line on the frame. The AirDog Air/Vapor return is sent back to the tank through a filler neck tee. This is a 165GPH (Gallon Per Hour) fuel system. Check out our installation manual for a list of parts that are included with this kit.