Powerstrokes use a proprietary filter housing designed and patented by PARKER hydraulic. Several years ago PARKER sued several companies like wix ect... for patent infringement. After that companies started changing their filters to no infringe on Parkers patents. These filters do not fit correctly or filter correctly and can/will cause significant damage to the fuel and oil systems. The only filter that should be uses are made or licensed by Parker. Until their patents expire that is what you are stuck with an over priced filter.
Oil filters from walmart and fuel/air/trans so on from the web. About the cheapest way to go. There has been many who have had problems because they used aftermarket filters. If you search around you will find many supporting threads...
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