At dieselfiltersonline they list Motorcraft FD-4616 $47.95 Racor PFF-4616 $36.06 and Racor PFF-4604 $34.89 which one is the correct one for '05 6.0 F-350 or are they all correct and just depends on how much you want to spend. Thanks in advance for your help.

 

I think FD-4616 is the redesigned one?

Slight improvement, more $$$

Racor 4616 and Motocraft 4616 is identical.

 

Thanks that is what I thought but just wanted to check with other that are better versed than I am.