hey a buddy of mine is making these subs...he took over from me. he made a website and stuff so you can order your boxes from there. theres hatch boxes only for now but eventually when he gets a sedan to test fit hell start making those. check it out http://www.mazda3stealthbox.com
i just completed a stealth box for the mazda 3 hatch.* its for an 8" sub and the volume is about .8 to .9 cf. Has 6 0r 7 layers of fiberglass covered in the same carpet as the trunk to match. Has speaker terminals built and sealed in the side with wire soldered. Half inch MDF on the face and a...