Never saw your reply to me previously. Yeah so I checked an it's the MB Quart 10" in the stealth box. Pretty muffled from what I used to have. Definitely considering switching it with a JL shallow mount or getting back into something bigger and taking up half my hatch space in the process.
If you check my thread I just recently built a custom box for the spare tire well. If you're willing to remove the tire you have quite a bit of space to make a nice box. My two 12" MB's have about .55'^3 to work with and I'd say SPL wise are right there with my old Type X.
SQ wise they're nowhere close but I'm in the process of exchanging some equipment out like my way overpowered M12 amplifier and faulty LCQ-1.
Since I had to replug in the stock Dynaudio amplifier until I get the processor back...wow...you will never want to go back.