I would keep you stock air filter box. From my experience the aftermarket intake cones are nothing but trouble for offroading. I put a K&N on my GF's 2000 xj and its been a nightmare. Yes you can buy the recharge kits, but it gets crudded up with crap so quickly. If you go through deep puddles the water will soak it and you Jeep will be dead till it drys. This happened a few times to hers. And when it was dry, I really didnt see any significant difference in HP or GM. There is a write up some where on JF about making a shield to block splashes but its still not full proof. Im still looking for a stock air filter box for her to get rid of the intake system. Her father threw it out. Unless your going to run a full snorkel which is totally unnecessary around here, stick with the stock box.