yours. you have two long horizontal cores stacked on top of each other. Russell has two vertical cores side by side. On your front mount intercooler the top core gets less air than the bottom core b/c the front facia blocks about 50% of the top core. On russells they both get about equal air. To try to say it simply, russell has in a way put two SMICs together to make a FMIC. I am sure his is nicer than that, but that is the general idea.