Jacked from another site...
I was amazed that there is pretty much nothing on the internet for a front speaker install for a Civic, so I am doing a writeup here to help you guys out who may be thinking of doing it. It seems like everyone just goes to a car audio place and pays someone $20 to install front speakers... well here you can save yourself $20. I found that I did a few things differently from other DIY'rs, so I figured I'd share.
I was given a pair of Kicker K525 4.5" speakers for free by a friend who works at an audio place. These speakers retail for about $80. They are 45W RMS and 90W max
Looks like 4.5