The grilles pop off the dash speakers (or they might have a screw or 2 at the bottom, I forget) and you can just unscrew the speakers. For the door speakers you can use pretty much anything since you have the vent windows. The last ones I installed I used 6.5" Polk components.. They sounded awesome. You do need to cut a hole in the panel and sheetmetal and the speaker screws into the sheetmetal.
