So, years ago I wasted....er...spent money on a K&N FIPK for my 1996 Mustang. Well, years and miles go by and the filter is pretty dang dirt and contaminated. Now, I could pick up their recharge kit and clean/oil it for about $13 which is fine. Except I'm still stuck with a poor air filter and oil blow by. Which, I guess, won't hurt much since its been fine for the last 50k miles. That said, I would like to replace with with a paper cone while retaining the FIPK intake which means a clamp on cone and not an OE replacement. I *believe* its a 6in ID filter.