I have a custom made enclosure that fits where the spare sits. It has an amp rack as well. Fits a 10" sub ported at 34hz. I forget the cubic inches off hand. I had a Audioque HDC3 in it. This enclosure sounded really good!! I was pushing 1,000 watts and it was pretty loud and tight. I have a peice I started to cut for the gap in the rear near the bumper. Asking $250. Im in Huntington Beach, prefer to sell local because its pretty heavy.