Acutally It looks like what he’s done is made the form out of foam and then glassed over it, and removed the foam underneath. Last time I checked a fiberglass fender would be lighter than a steel stock one. Not to mention, if he kept all that foam in there he would be fucked if it caught fire.
Props for the work but if you’re going that wild widebody, don’t use 3" spacers on stock wheels. that = fail.
Also, he needs to drop that shit fast and get rid of the gawdy sideskirts.