One of the best things I ever did was replace my factory speakers and sound deadened the doors at the same time. Pulling off the doors will take you about 5-10 minutes the first, and less than 5 minutes after that. If you get 5-1/4" speakers for the rear. You can mount them on top of the adapters that are already in place. Just pull the old speakers, cut the plug off the factory speaker, put it on your new speaker, and put the door back together. New speakers with a new head unit are going to sound a lot better then the factory ones.