What's size speaker will I need to buy

10cm

I used to direct replacement pioneer ones. You lose the use of the rear tweeters, but they're in a crap place to begin with

10cm

I used to direct replacement pioneer ones. You lose the use of the rear tweeters, but they're in a crap place to begin with

 

I used the pioneer ones..............................just soldered the two + & - wires together and terminated them onto the new rear speakers............now have four rear tweeters!..Two inbuilt in the rear Pioneer speakers....and the two OEM in the rear doors!