I was trying to find good flexible material, and the only plastic seems too oddly shaped for an air dam. This is fairly thin metal and bends well, so when I do hit something I think it won't kill it. I drove around a dirt road and only hit in one spot which just dented a small area in. The brackets seem to be on there so tight that the metal will bend and work as planned. There are a few speedbumps around my college that I'll have to test out sometime. This metal is actually really easy to shorten (folds on the lines and snaps off after bending it all the way in each direction a bunch of times) so if I come across a lot of problems I can take off an inch at a time.
I took a few more measurements:
Ranges 3.5-4 inches off the ground (corners are lowest)
Height is 5.5 inches from the bottom of the bumper
I don't drive all that much, but next time I do I'll report back on the clearances and any modifications to the air dam. In a month or so I might have a fill on the tank and get a mpg reading since I don't have a scangauge.
I hope you all like the license plate too
It's real!