After the itch to upgrade returned once I got the stereo squared away, I figured I should see what I could do to help the 4.0 breathe a little easier. I decided on the AFE Stage 2 Cold Air Intake as it included an actual heat shield to separate the filter from the hot air in the engine bay. I don't have any precise measurements to speak to the HP/TQ gains from it, but I can honestly say that I felt a very noticeable increase in both top end pull and low end torque. Oh and you can't beat the induction noise you gain around 2500-3000 RPM when your on the throttle!