Ok now that im calm I will try to shed some light on the situation. When the box was placed in the trunk it would not shut. So to make up for the extra space my neighbor cut out a section that was the shape of the tire well, but by doing this he cut into the port. So I came up with the idea of sealing the port giving me 4.72 cuft and using 4 4in pvc pipes 20 in long to give me 35hz basicly im trying to save this hunk of wood. But the first step is boxing out that section.