RE: 4 to 6 Speaker Upgrade
The wiring is not there. I was told by a professional car stereo business that they could be wired to the front door speakers but the shop tried to get the top of the dash to release like they have done on many Chargers and they could not easily do it. They did not want to bend or break anything so we quit. I have the upgrade (Kicker) dash speakers in my garage and they can be bought cheap. I did upgrade the doors and the rear deck and I am very happy with the difference that was made.