I know this is a laaaate update. I've been driving on the freeway, off the freeway, A/C running, stop and go traffic, you name it. It runs great, stays cool and the A/C stays cold now. All of this in a constant 100-120 degree days in AZ. Summary, 3 core radiator, new silicone in the clutch fan, proper (factory fan shroud) and factory t-stat.