ONE Exhaust Manifold Hex Head Bolt is a direct fit for the following:

1995-2003 Ford E-350 Super Duty
2002-2003 Ford E-450 Super Duty
2002-2003 Ford E-550 Super Duty
2000-2003 Ford Excursion
1994-1997 Ford F Super Duty
1994-1997 Ford F-250
1999-2003 Ford F-250 Super Duty
1994-1997 Ford F-350
1999-2003 Ford F-350 Super Duty
1999-2003 Ford F-450 Super Duty
1999-2003 Ford F-550 Super Duty