I'm not sure about front, but you will definitely need honda -> iso adapter PC2-87-4 model
I think you will also need fm antenna adapter, but i went DAB and see no reason to use fm any more
if you have japanese pioneer radio, you don't need a front bezel, old one will fit.
I just finished installing new pioneer radio in my car.
I hope that helps...
ps. you will need to remove central console to connect parking brake sensor. Easy job and took me only 15 mins to complete