ONE Air Intake Valve O-Ring Seal is a direct fit for the following:

1997-2004 Ford E-150
2003-2004, 1997-1999 Ford E-250
1997-1999 Ford E-350 Super Duty
1997-2004 Ford Expedition
1997-2004 Ford F-150
1997-1999 Ford F-250
1999 Ford F-250 Super Duty
1999 Ford F-350 Super Duty
2004-2007 Ford Taurus
2002-2003 Lincoln Blackwood
2000-2006 Lincoln LS
1998-2004 Lincoln Navigator
2004-2005 Mercury Sable