What’s under the rear floor

[T-Boom]

My son has a ‘13 R Spec sedan and wants to install more speakers. Looking in the back seat area. Anyone know what’s under the elevated section of the rear floorboard coming out from the center console? I have looked all over for diagrams with no luck. It sounds hollow.

 

[RSpectnewbie]

I'm assuming you are talking about the transmission tunnel since it is a RWD car. So that would be the driveshaft.
He can remove it for more speakers if he wants but the car won't get far.

 

[Mr. Incredible]

agreed, the transmission, the driveshaft. and directly under the rear seat is likely the fuel tank:

 

[Ambush]

Use the rear trunk area where the spare tire is. Fake floor subbox.

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Hey guys, As most of you know, I am a big fan of fake floor installs…the primary reasons behind this are the facts that fake floor builds take up less amount of usable cargo space and can be hidden out of view from potential thieves. Over the years, I have probably done hundreds of fake...

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[Gunkk]

Rear deck or trunk mount is the way to go.

 

[Bill in Alexandria]

I would sound-deaden the spare tire depression and the trunk lid (and make sure you put a little behind the license plate to keep that from vibrating as well...) if you choose the fake floor. I'm about to replace the OEM sub with a better one on the rear deck.