First you do this, then you get a torch..... Seriously you should be able to take out your back seat an the tool tray. Then You can go a full sheet of MDF wide @49 inches. Go as tall as the bottom of your window line. If you want your 12s firing up go 14 inches deep and stagger them slightly or if you fire them foward you can do the same thing. Measure and double check but you should be able to do it with out alot of hassle. I had a box like this in my 01 and it was around 7 cubes, plenty of room. If u have any questions let me know.
i am doing four infinity 12's and we gutted it out but the 8 bolts that held on the brakets for the seats rattle. i kno this because i use to have 2 and now i want four but we are going to fiberglass a box, because my dad is in the auto body field. so i was wondering if there is an easy way to get these bolts out of there?