METCO 1979-2010 Mustang & Ford Truck - Fuel Rail Adapter METCO Ford Fuel Rail Adapter This exclusive adapter is only available from Metco Motorsports! This adapter fitting is CNC-machined from stainless steel and attaches directly to the schrader valve outlet on the Ford factory fuel rail. The front side of the fitting accepts a standard 1/8" NPT fitting for a direct-mount fuel gauge or a gauge sending unit. Quarter not included... Note: This adapter is available with a 1.5" liquid-filled pressure gauge under Metco Motorsports PN MFP0004.