you dont have to buy a custom dash however, you will need to buy a "dash kit" if you go to any custom car sterio place theyll take care of all that for you... however, sometimes the dash kits can be expensive... also reasearch how expensive they are you dont want the audio place to rip you off telling you the dash kit was 300 bucks ive seen dash kits cost anywhere from 15 - 350 on hondas so... check a website called Metra or google metra dash kit find the specific number of the dash kit on the metra website go to amazon and put that in "Metra dash kit number ______ " see how much it is those audio place love to say there alot when there not