I had a 1989 Mustang lx 5.0 convertible, the works pretty much, i took out the stock intake (it already had a new drop in K&N filter, but still replaced the whole intake, well i saved that filter for some unknown reason, its brand new in a box and i was going through some stuff when i came upon it, at the same time i was doing the airbox mod on my Titan, well i compared them both and they are alomost identical filters, except that the other one is a K&N from the Mustang, i dropped in the Titan airbox and what do you know, it fit almost perfect, off by about 2/8 inch on both sides, but the rubber seal around the filter covers the rest of the box, i was like

that there my friends saved me $45-55 dollars, now with the airbox mod and K&N i can truly say i notice some kind of hp & trq increase especially above the lower rpms it just pushes you against the seat a litlle faster and harder, im happy with new mod, now for just waiting for the better gas mileage
