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.
I, for one, would love to see pictures of the factory set up so I could fab up my own. Cabin filters are one of those things you laugh at until you try it...
'99 F250 V10 Super Cab Long Bed 4x4. '06 short block, PI conversion, modded airbox, 5 Star custom tune, FM50BB, 315/75-16 GY Duratracs, mild lift, 4.30 LSD, Ride-Rite bags, on board air, Rancho RS9000 w/MyRide, under bed subwoofer, 160 amp Quick Start large case alternator
Why, yes, I am some kind of geek engineer. Thank you for asking.
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