When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I can tell you first hand that they weigh nothing. I'm helping prepare an AI car out of an 05' GT. I personally gutted the doors. Once you remove the glass and associated mechanisms they are light as hell. You can't even remove the crash beams like we did on the fox's, because they are the only thing that give the door any rigidity. In a class where weight is paramount, if there was an advantage i'm quite certain he would do it.