THere's a part number in the instructions, but with that said, i would think that any made for bronco filter would work just fine, no need to pay the Roush tax for just the filter. this "CAI" is just the lid and the filter, leaves the stock airbox alone
these can be gotten for a lot cheaper than msrp. i got mine brand new for $200. i didn't expect any gains, i really just wanted the window, but yeah, don't pay list price for these!!
100% want to buy a rear tonneau cover and a rear cargo shelf that folds down & is built to be quickly detachable/removable. and it doesnt block the 12v power & light in the rear.
also want something to fill in the B pillar area to give it a finished look with the top off.