It's not Cozs' fault the radiator isn't making your car cooler. It simply has the ability to hold more water that can be cooled while its flowing thru the radiator. If there is any weakpoint in the cooling system it can cause the car to overheat. Having a weak fan clutch, clogged up condenser, bad cap, etc..... Anyways, don't count on the radiator to drastically lower temps on the car. It is Koyos fault that their crappy design for the breather cap/drain plug sux so much. At least the newer ones have a better neck design.