I took out the OEM tweeters The they look like something you would find in your keyboard or casio calculator. I got some 3.5 inch replacement and since the OEMs have NO depth any type of new tweeter around the size of 3.5" you will find yourself cutting away the dash. Cutting takes alot of time. The best way to cut the hold is to use a drill it will look messy but with the glass in the way it's the only way and even if it does look messy no one can see it after u put the top dash back
But it was really a pain in the ass I think u may not want to replace them since if u do u'll find that the sound coming from the dash will filter out the door speaker....as for me I love it