You want to buy them from your local Int'l truck dealer.
Racor quality with Aqua-Bloc (The white media on the large HFCM filter.
No white media... not OEM!!!!
Int'l sells for around $33.00/kit (2-filter kit). This is less than NAPA and less than Ford.... so why buy non-OEM filters at any cost. The HFCM filters and seperates water... yet people will consider a fuel filter without the white media (which helps seperate water)???
You want Int'l part number: 1847170C92
Order by part number and not stating that it is a 6.0L diesel as Int'l uses a different fuel filter for their version of the 6.0L motor.
Racor is the OEM manufacture for the fuel and oil filters on the 6.0L motor!!!!
Check out the link below of what the filters should look like (with white media and all) and how to change....
http://dan.prxy.org/Truck/Owners_manual/Service_Points/HFCM/HFCM.html
Good luck,
Jeff