This is the AirDog II-5G DF-220 fuel system for the 2001-2016 Chevy Duramax. This diesel lift pump mounts to the frame rail using the supplied sandwich plate mounting system. A 5/8in draw straw is installed in the fuel tank to draw fuel to the pump. The pressure side connects directly to the factory 1/2in fuel line on the frame. The AirDog Air/Vapor return is sent back to the tank through the factory 1/2in” suction line once the module is modified. This is a 220GPH (Gallon Per Hour) lift pump system for heavily modified trucks (1000 HP and above). Check out our installation manual for a list of parts that are included with this kit.