the 8" fits......barely
Luck has it I just installed an 8" last week in my 2009 CC. It took me a couple try's to get it in the right position. Not one oz. of room left and I didn't even use the mounts they supplied. It fits behind the passenger rear seat (just in between the seat hinges). I fought to get the seat studs to line up again, but they did. I ran the wires up the driver side to the factory stereo. I tapped the power into the 30amp upfitter switch beside the brake pedal and grounded it to the rear seat belt. I didn't think it would fit at first, but with some patience it worked. I did remove the jack bracket on that side.
It is the self powered unit and was on sale at future shop for $100. I use to be into car audio heavily. I had multiple systems from 2-15" to 4-12" and now drive around shaking my head at people that I use to be.lol Anyway, it has enough bass for country and rock. However, if you are listening to more bass driven music as hip hop or r&b then you may want a little more. I am actually impressed of what this little tube is putting out. I bet a second one would be more than enough bass for most people. I wish I could adjust the frequency as it needs to be set a little lower to keep out the mid range notes. I'm already thinking of the jl 13tw5. But to do that I need a lot of time/money to install other components to retain the stock radio. I don't want peering eyes to be enticed by an aftermarket radio screen.
So yes it fits. Great sound for the price. well worth trying for $100. But don't expect big bass if that is what your after.