Fuel Filler Pipe To Body Cork Gasket for 1965-1973 Mustangs.
If you're replacing your gas cap or filler pipe it is highly recommended that you change out this gasket. This is the gasket that sits on the end of the filler pipe and meets the gas cap.
Note: If you put two gaskets on the filler pipe, it helps to move the gas cap away from the tail light panel. This helps to keep the gas cap from scratching the car when it is twisted during opening.