this is what ill do probably plan to make amp rack and i want it air tight //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifme and a friend just finished his malibu and we sealed it off by making a wall out of mdf then foaming behind that. we also made an amp rack in the trunk so that the foam wouldn't be visible when he popped it open