They look aftermarket to me and from the looks of the front spoiler they aren't doing a very good job. I have a set of casters on my car trailer to help it from hitting at the rear of the trailer, I think they serve a similiar purpose.
Not a bad idea.... I'm sure from 95% of the angles, you couldn't see them anyway because the car is so low. I was trying to come up with an idea to keep the front end from scraping....but there's just no room to work down there. I think I'll pass on the skateboard idea though :biggrin: