Mine... 5" wide strips of 18ga. steel bolted to aluminum angle attached to the flat flange under the bumper and fenders. Really stuck this thing down at 140+.

7723139-Airdam.JPG (476 downloads)

11.33 @ 118.46 on motor
10.75 @ 125.35 w/ a little spray
Now, high Speed Open Road Racing - Silver State Classic Challenge, Nevada Open Road Challenge, Big Bend Open Road Race
Rocky Mountain Race Week 2020, 2022 2.0, Sick Week 2023