6.5" will fit in the front door, just drill out the factory aluminum rivets holding the speakers in and mark and drill for new hole locations use sheet metal screws to hold in place and some silicone adhesive around the edges to help hold speaker more securely and lessen vibration. 6x9's fit in rear you need to mark new hole locations and drill as well...I did the drilling for the rear 6x9's from the trunk. You can go to
http://2k7corolla.blogspot.com/ for pictured instructions if you need clarity.