[7stringtheory]

This is just my opinion guys but if you look at the options available from a place commonly known as sub of thump, they have enclosures (for 2 10's or 2 12's) for gen 6 camaro's that are designed to fit snug up against the back of the passenger seat and take up little enough space that you can still get to the spare tire area and your battery in the trunk and require no modification of the car directly. (although optionally you may want to fabricate some method of securing them)

These are sealed enclosures, and the way to "get it right" is pretty simple.
1) look at the cubic ft / sub rating for the enclosure, and find a sub you like with the manufacturer listed spec for optimum space in a sealed enclosure that matches that
2)find an amp that will power the subs
3) profit

This does limit your choice in subs however if you want it to sound the best, so you can take the route im going and just get a shop to build you a custom box that occupies the same space and concept as the ones on sub of thump.

Prices:
Sub of thump - $280 for the nice rear firing box with vinyl stitched front
Local Shop - $400-450 for custom fabricated rear firing box with vinyl stitched (or whatever fabric i want) front that is designed to perfectly match the subs I choose.

When you look at the cost of the JL audio stealthbox. You are pretty much paying the same price that it would cost to custom fabricate the enclosure once you subtract the cost of the sub. I am not disagreeing that it is well built though and will sound great, I would just rather not cut out my trunk liner, and I would prefer 2 10's over 1 12.

Edit : by passenger seat I mean rear seat lol