VMS gauge adapter fitting 1/16" NPT Male to 1/8" NPT Female adapter for Ford fuel rail. This VMS gauge adapter will allow you to install a 1/8 NPT gauge, or a gauge sender, directly to your 1986-1995 Ford Mustang 5.0 Fuel Rail. You just remove the Schrader valve that is on the fuel rail and install the VMS adapter and then install the gauge or gauge sender