Like I keep saying, his problem is light bars, not intercooler.
Just for you to know you might be right I just bumped into this thread searching for an over heat problem for my truck.
My truck over heats in the dunes only Yes I do not have a bigger inter cooler yet but the only common thing is I have 2 MR lights behind the grill so I will be removing them soon and checking the temperatures, I hope this sorts out my problem.