The TJ came with K&N's FIPK, makes it sound and feel really fast, if it is or not, I don't really care.
Anyway, after Camp Jeep, and quite a few trips on the "C Road" which was a dusty access road through what looked like a gravel pit, I thought I'd better clean and recharge my filter cone.
HOLY CRAP THAT THING CAN HOLD A LOT OF DIRT!!!!
...point is, change your air filter, it can make a big difference in performance and maybe even gas mileage, and with gas creeping up on $3 a gallon, every little bit helps!
DrJ