The Wix looks great. While it's got the classic type design (excluding bypass), without a date code I can't say it's from when Affinia owned Wix. Could be some time after M&H took over. What's interesting about the 5/1372 application, Wix/(Napa Gold) always used dome bypass. That, even while vast majority other Wix/NG application were using thread/base end bypass. Always wondered why, and if it something to do with Ford/MC rights using base end.
As for base vs dome end bypass, Ford with Motorcraft has been pickier about it. That said, "I" never thought it a big deal either way, Seems Ford now may be thinking similar as some Motorcraft applications for Ford appear to be moving to dome bypass now.
Not keen of the angled pleats area and pleat spacing on the FL820S, but not uncommon in that application. As long as it didn't tear, got the job done. At a longer interval, might not have been the case.
Thanks for c&p.