Last time, we took a look at the unique design of the Ford 6.7 secondary Super Duty radiator and its accompanying thermostats. Our last post was only about two weeks ago, but I come bearing some good news - plus, great things come in twos.

Why does my primary rad need a companion?

As a recap, this heat exchanger, found in 2011+ Ford Super Duty trucks, works as an integral part of a mostly independent secondary cooling system that manages many of the truck's auxiliary cooling needs, including those of the liquid-to-liquid charge air cooler. Cooling these engine components more efficiently should not only prolong their useful lives, but also may make for some nice performance benefits if coupled with a tune - who doesn't love colder charge air?

The secondary system allows the primary radiator to more exclusively and efficiently cool the torquey Power Stroke motors found

Whether we're talking about turbochargers on an F-150 EcoBoost, V8 engines in an offshore powerboat, drummers in the Allman Brothers Band, or pieces of Carvel™ Ice Cream Cake for dessert on my birthday, sometimes two is a better option than one. This was very much the school of thought that Ford's engineers adopted when designing the cooling system on the 2011+ F-Series Super Duty trucks, including the F-350, F-450, and F-550. These trucks feature two systems that work in parallel to handle all of the cooling needs in your truck, and both are equally important.

Our engineers at Mishimoto also see the value in the "two can be better than one" mindset. When we bought our Mustang GT, we didn't stop there - we bought a turbo model, too. Many of you may know that we have already released a