what size speakers fit in the factory location??

also can you jsut change the head unti and intergrate the factory speakers with the new unit??

 

All 4 speakers are 6.5's. However, if you replace the door speakers, it is likely that you will have to have a spacer for the speakers due to the depth of the magnet. Just do a search and you will find out how to make a spacer out of the factory speaker spacer. If you have the Bose system in your Z, then I believe you will have to either have a LOC for the speakers or you could just run all new wiring to each of the 4 speakers, which is what I originally did. This will just depend on what exactly you plan on doing or the amount of work you are willing to put into it. Hope this helps a little.