The rears are not 6x9's. They are lil tiny things. The stock speakers are 6.5 in in the doors and behind the seats. I thought the rear speakers were 6x9s but when I had my sub put in I saw them and they are alittle bigger than a tweeter I think. Here is a link
http://www.houston-f-body.org/tech/monsoon/Camaro.htm