The I have mine surface mounted over the original tweeter location. That is how I originally had the Polk Tweeters and I just did the same thing with the Hertz. I think the tweeters could go into the stock tweeter location, but would require you to remove the tweeters from their casing or housing without damging them . It's been done, I just didn't do it that way. Here is a shot. Yeah lots' of dust/dirt in this shot.