There is a guy on this board named Naf who has modified his kick panels and I've sent him a PM but I was wondering if anyone else has replaced the speakers in these things. Passenger side will be no problem it looks like the driver side will not work. I may just cut the back out of the enclosure...

I actually pulled mine apart tonight and the amps have been removed.

 

I had the same problem, none of the aftermarket speakers fit in the bose enclosures. What I did was make my own enclosures that look like the bose ones but on the driver side I made it a little bit thicker to fit a 6 1/2" speaker. I will try to get some pictures up in the next day or two.

I attached a picture of the passenger side one. They look pretty much the same.

 

Just purchased a camaro so am looking to do the same. what material did you make the kick panels from? How did you attach them?

 

you can build your own, I just did this for mine and wrote a tutorial.
See Sig.