Air scoops.

[jus_me]

I dont think that duds scoops are going do anything but block the air. they are to big and go to far in to the frame, and i think the A-arm's will hit them. What did he do to the bumper?

I was thinking same thing. How could they even work for him there jammed right in there. It doesn't look like he left any room for air to pass bye other than through the fins. There may be some math with the angle and over all size but what you have seems to be doing the motor sone cooling justice.. All being said id rather 6 degrees cooler than hotter.. jmo.. Nice metal work btw 79 Bronco.