Ok...Since I bought my car, I thought that my front speakers are 4"x6" and my rear speakers are 6"x9". Well, someone told me that the rear ones are 5"x7", and someone else told me that my rear ones are 6 3/4". So what size are my rear speakers?

 

The original rear speakers are 6x9.
Non-Bose front speakers are 4x6.

Bose front speakers are somewhere between 3-4" round. I THINK some modification is necessary to put any aftermarket speaker in the Bose pod. Someone here said they got a speaker to fit from Circuit City, but they didn't know any details. That's why I just bought 4x6's, and mounted them on a board in place of the pod. After my boards rot, if I haven't run across a set of non-Bose baskets, I will modify the pod for 5.25s (as someone else did here).