I had a chance to take some measurements of the airbox temps and compare that to the OBD-II reading of the Intake air temp (IAT) on a long trip this past weekend. The numbers are astounding to me. Obviously, these #s are not very accurate and there were lots of variables (vehicle speed, cross wind vs head wind, etc). Let's not dwell on the exact numbers but the relative delta between them. Outside temps: X Air box temps: X + 40 degrees IAT temps (OBD-II): X - 7 degrees. Interesting to note that the air gets cooler as it travels on the plastic air intake tube. That surprised me. My IAT temps often reached 140* while traveling at 70 mph with an ambient outside air temp of around 74* (A/C on or off). I was climbing lots of hills and the water temps often reached 200*. I had lots of head and cross wind. While on the return trip home, the IAT was around 110* while the ambient was around 70*. Lots more tail wind and fewer hills. Air box temps went up during higher engine RPM operation vs lower RPM (hills). Air box temps sky rocketed while in 4low with the aux electric pusher fan on or off. It hit 150* at times. I then moved the temp reading device to a bone stock 80 in front of me and he reported 120* to be the highest temps he was seeing. I have the usual mods: bumper, winch, lights, york, extra battery, 4" lift, 7,000 cst clutch fluid, 4.56 gears, 315s. I was towing a 1500# trailer on this trip. Obviously a snorkel would help with cooler air going into the engine. But, an immediate concern of mine is how to evacuate the hot air that's under the hood. Hood louvers may be a solution. I should also remove the side skirts from the fender well area to see if that helps. Perhaps drive around with no hood to see if that really helps!