Huh!!! The first post starts off with: So what did you have in mind then if not a guess what this is thread?
OK, fine. Based on the six picture I would say that it's a device that will prevent you from falling out of your car when coming home drunk. Disclaimer: Neither I, ownership of this site, or its representatives support drunk driving. Above was meant as a joke. Please don't sue us.
Whatever it is, it must make the car go faster 'cause it's painted red. What's the base material, that gray stuff under the Bondo? Could be open cell foam, could be granite, can't tell from the photos. Hurry up and spoil the surprise already. =)