Originally Posted By: RF Overlord
Originally Posted By: wiswind
The manufacturer's specification must be for a dome end bypass for the listed application.
51372 is the WIX equivalent to the Motorcraft FL820S. Ford calls for a threaded-end bypass on that filter.
Looking at the big picture, I don't know how many Motorcraft filters historically were/are thread-end bypass, but everyone I'm familiar with in recent years was...Ford must prefer the thread-end filters.