Radiator Thermostat Coolant Reservoir is a direct fit for the following:

2003-2007 Ford F-250 Super Duty
2003-2007 Ford F-350 Super Duty
2003-2007 Ford F-450 Super Duty
2003-2007 Ford F-550 Super Duty
2003-2005 Ford Excursion
-With 6.0L Diesel Engines
**Reservoir Tank Does NOT Include The Screw-On Cap (Sold Separately)**