| Sure, there's lots of number proof that the Howe and Koyo do indeed cool better than stock. There's NO disputing that. I even went to a brand new stock radiator for a time to make sure it wasn't just a case of bad stock versus good aftermarket :) If you mean between the Howe and Koyo, there's nothing scientific. Just dozens of people with each saying my car ran XX degrees cooler in XX weather for XX time. Lots of high and low data for each. When my Koyo goes, I'll probably get a Howe just for spite to show they are too similar for anyone to care =)
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