I am here to tell you that the rear speakers that come stock in the rear doors of the P5 are 6's NOT 6 1/2!!.....
HOWEVER.....a 6 1/2 will go in there nicely.....BUT...if you want to remove the rain guard from the stock speaker and use it on your upgrade...they will NOT fit on a 6 1/2....that is unless you do some cutting and trimming....which I did. I installed Rockford Fosgate FRC3206's in the rear doors....they sound GREAT!! and I did use the rain guards...but they actually required me to cut them so that they could spread out a bit to fit the LARGER speaker diameter.
HOWEVER.....a 6 1/2 will go in there nicely.....BUT...if you want to remove the rain guard from the stock speaker and use it on your upgrade...they will NOT fit on a 6 1/2....that is unless you do some cutting and trimming....which I did. I installed Rockford Fosgate FRC3206's in the rear doors....they sound GREAT!! and I did use the rain guards...but they actually required me to cut them so that they could spread out a bit to fit the LARGER speaker diameter.