My theory is the stock radiator in our cars is designed to effectively cool our relatively stock engines adequately. When upping horsepower we of course increase the heat. I am thinking our stock radiators can't hack it. to add to that I read on here the stock water pumps suck.. Is the only answer to keep things cool a $400 radiator? I was hoping there was a less expensive radiator out there that can keep up with the increased btu's