I always have the air off while on trails, kinda figured it wouldnt help the temp (doors & windows are better!). But let me know how the bigger radiator works, might have to pick one up. I dont have a grill insert now, but I like the look of em.
Back to the K&N intake, would you recommend? And I really am a noob... What is the exact purpose of these...
About the filter, people believe that the cloth filter with spray does a better job capturing dirt/airborne particulars before they can get into your engine. The manufacturers of these items boast this and an HP increase. I use them because buying a regular filter is so expensive. By the time you swap out 3 or 4 regular filters the K&N or other reusable filter has paid for itself. A couple of things you must do with these filters is clean them regularly and re-oil them. This entails, cleaning them with a degreaser solution that the manufacturer will be happy to sell you, letting then dry, then re-oil, let it dry, then install. Letting them dry is important as you don't want the oil dirtying up your TB or air sensor.
At this time I am running a panel filter and using the stock box. Where I live the air is often dusty just from the wind, we won't even talk about being on the trails out here. The panel gets cleaned often due to this. At some point in the future I may run a cone filter but will have to come up with a way to protect it better than running open as I see most people do. With this said I personally would not invest in a CAI (Cold Air Intake). CAI's IMO should pull from the outside air and not the engine bay. From most of what I see with Jeep CAI's they pull from the engine bay. For the cones a lot of manufacturers are offering a "pre-filter" that can be easily removed, washed with water, dried and re-installed thus, preventing the heavy maintenance of the oiled portion of the filter.