[Big Dave]

I did not remove my air dam at all during the recent brutal winter in Indiana.

I notably bulldozed some snow as my air dam sits 7 inches above grade at the sides and 10 inches above grade on the centerline.

My air dam is 3/8 inch ripstop conveyor belt. It is expensive and a real bear to fabricate, but it is utterly impervious to road debris of any kind.

It is so difficult to fabricate that when I make another air dam, I'll make a paper or cardboard pattern and pay the shop rate for an industrial supply house to shear, trim, and punch holes in the stuff. Once installed you can forget about it.

7"/10" above grade clears most parking curbs OK.

My air dam is effective. It improved my F350's fuel economy by 1 MPG.