I always used a Motorcraft FL1A for my older Fords. I haven't replenished my stock recently so I haven't seen any new ones lately. One of the reasons I liked these FL1A's was the base end bypass valve. Was in Walmart this morning and the new ones now have the bypass valve on the top plate like all others. With the nitrile ADBV on the FL1A , I did not see any advantage to this model anymore. I ended up buying Fram PH8A's, same bypass location but atleast there was a silicone ADBV. Seemed the PH8A had more going for it at a slightly cheaper price.