I'm having my car completely redone in a body shop to rid of hail damage and get it repainted.. well I had to pull my headliner and was trying to think of things to add to my car without breaking the bank but making it nicer. I plan on adding two 6.5 inch subs under the rear sway bar but what do you think of this idea?.

There isn't much room up there but there are two pieces of styrofoam on both sides that I could easily use to hold the speakers.

And if this is even a good idea.. what brand/size of speakers do you recommend to add to the existing 7 speaker bose system?

 

By the lack of responses,I'll be the first to say its a lame idea.
Try this in a Civic.

 

Lol...even in a Civic this is a lame idea.

The imaging would be terrible, dont do this.

 

Thanks, body guys suggested it... lol