
Incorrect filter numbers were listed in owner's manuals and on parts shelves in car dealerships in 2017. Also, for some silly reason, you'll find that your air filter is listed as a 2 part #, the foam is called the pre-filter, and the oval is called the filter. To answer questions, this is a complete filter with foam and filter. FYI, while I was using the aftermarket system on my 7.3 with these trucks and filters, independent testing was done on these 6.3s. It was found that aftermarket systems were not needed. also for tuned trucks. The only difference was in the professional class competition trucks. Motorcraft filters have been found to capture far more particulates than other filters. For those who blow out their filters when servicing their trucks, put the new filter on a kitchen scale, put the old filter on the scale, now you have a yardstick to buy when blowing one out. My truck drives in fine mud where my filters are changed 3 times the recommended rate and blown out when changing the oil.

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