It appears it's still possible to overheat a stock FL5 on track. Stock tune, PRL intercooler and HEL oil cooler...and that's it. Before you guys beat me up to bad for not noticing...let me just say that I was laser focused on A) not crashing the car B) not over revving the engine C) not hitting another car. I did finally notice towards the end of the video. Post assessment when I returned to the pits didn't yield anything very concrete. It was not abnormally warm under the hood, the oil cooler surface temp was 126 degrees Fahrenheit, and the coolant puke tube had pushed out an ounce of coolant. There are two things that I did that resolved this issue, which were to run the heat in the cabin, and remove the rain guard under the hood vent. I also became more cognizant when I noticed fluctuations and would begin to short shift if need be until I was comfortable with the reduction in temperature. All that being said, I did place an order for the PWR Track Spec radiator today, and look forward to its arrival.