Fl500s is the filter listed in your owners manual. No idea what other numbers you saw.there is also the same filter with an A or B in the long oem part #. Are they different?
Likely just changes to a supplier, or internal tweaks. Ford will give identical parts on the Mach1 and Bullitt 2 different part numbers for no really discernible reason also. Fords been using the FL500 for like decades at this point.AA5Z6714A
# on filter. There is also a AA5Z6714B. Wondering whats the difference?
If they are both FL500S, same filter.AA5Z6714A
# on filter. There is also a AA5Z6714B. Wondering whats the difference?