I've got a custom 12" sub box that fits in the left rear of the trunk of a 2000 Toyota Camry. I made it from fiberglass and mdf. The volume is 1.4 cubic feet and it's very sturdy. I can't find the pictures of it in the trunk, but I'll keep looking. I've attached pictures of the front and rear. I'm just trying to find out if there is any interest in this box before I consider pricing it. It's currently got a 12" JL Audio sub model 12W1-4 in it. I'm willing to sell the box with or without the sub.