5 1/4 in the doors but 6 1/2s will work. 4" in dash. I'll sell ya my Kicker RS6.5 if you want. I used them for about 2 months. Has all the hardware box and instructions. They sounded good on the kicker amp.
Will 6.5's fit in the doors of a 2002 2 door gt? If so is there modifying that has to be done?