Someday I may upgrade the stock stereo. To brainstorm, I figured I would take apart some panels to see what would be possible. Here's what I found:
Should be easy enough to get in two full-DIN units up front.
Front doors can handle 5.25"
Rear doors can handle 6.5"
Rear deck can handle 6.5"
| Head Unit |  |
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| Driver's Door |  |
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| Left Rear Door |  |
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| Rear Deck |  |
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| Wide Shot |  |