I cut alot of the fender out to let the air flow out.....i've seen alot of Jeeps with v-8s luve(spelling) the hood, you know the vents. I'm pretty sure i have just a 3 core rad. never thought of that option.....know where i can pick up a 4 core, for a decent price. Also, i have a winch sitting in front, I know that reduces air flow.