What needs to be done in order to change the head unit in my FD? What needs to be taken out and how? Thank you.

 

Pay a little visit to the interior section and find what you're looking for you will.

 

Download the Body and Electrical Manual in the stickies at the top of the page. Go to page J-1. You need those two little 'U' shaped tools which you can usually get at any auto parts store. Assuming you have the stock head unit, carefully pop off the two narrow covers on either side of the head unit. You'll see two holes on each side. Insert the tools , pry outward while you pull towards you. Simple. Just be careful not to scratch the crap out of the plastic if you've got a 93 model.