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Each front bag assembly is composed of the upper spring bracket, the airbag (more properly called an airspring), an air line fitting, a lower front A-arm plate, and a 7/16X8-inch stud. This photo shows the components assembled and ready to install in the vehicle spring pocket. But, before you do so, install a straight air line fitting (and one end of the air supply line into the fitting) into each airbag. You'll also have to enlarge the old upper shock mounting hole and drill an additional one to route the air supply line.