Piston Rings Kit 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
2005-2010 Ford E-350
2005-2010 Ford E-450
6.0L Diesel Engine

Genuine Ford Part Number: 4C3Z-6148-AA