I purchased a Wix cabin air filter, 4876, and after removing bottom cover I discovered the filter area was blanked off. Does anyone know if it's possible to retrofit a filter in this air box.
Very few of the F150's came with the cab filter. There was a kit to add it on, but I believe it was discontinued, so it will probably be very difficult to find. I'm sure you could find a way to add it on, if you really want it and use some creativity.