I offer a Russian birch plywood panel covered in black trunk carpet, brackets and custom grill that fits in the stock tire cover (after you cut the plastic inside the line already molded in there) - almost like it was designed for it. Anything more than the 10” FreeAir driver is really pushing the physical space limitations of the rim area or requires the removal of the spare not to mention the increased modification of the rear cover.
I wanted a simple, good looking but highly effective way to noticeably increase the sound of the stock (or aftermarket) system that doesn’t disturb the car next to you or be overly complicated or take up more space than necessary. Switching the sub in and out of the system shows the huge difference that it makes - true, it isn’t going to win any competitions, but you’ll feel and hear the difference. Demos avail at any meet....