Motorhome Speakers

In the motorhome, the front speakers are 6 inches round and in the cab doors.  Currently, there are ports for two 6 inch round speakers in the chassis' cabinetry.  But I'm going to upgrade those ports to 8 inch round speakers.  Today, I just purchased the grills and back covers. 

Those back covers were a bit hard to find.  They have to be there to protect the speakers in case something gets stacked on top of their back sides.