1 Engine Oil Cooler O-Ring is a direct fit for the following:
1991-1997 Ford F-250
1999-2003 Ford F-250 SuperDuty
1991-1997 Ford F-350
1999-2003 Ford F-350 SuperDuty
1999-2003 Ford F-450 SuperDuty
1999-2003 Ford F-550 SuperDuty
1984-1989 Ford E-250
1984-2003 Ford E-350, E-350 SuperDuty
2002-2003 Ford E-450 SuperDuty
2002-2003 E-550 SuperDuty
1997-1999 Ford Econoline SuperDuty
2000-2003 Ford Excursion
Genuine Ford Part Number: 1C3Z-6K649-BA