I've just completed installing all of my components in my car. I have Kappa Uniplanes on the side of the door and Polk Tweets on the dash. They sound great, but the only problem is that the Uni's don't play good bass. They're great for what they are, but regular 5 1/4 or 6 1/2 have a much greater advantage over these. No drilling was required, except for cutting the panel. Bostons were used to replace the rear 4 inche speakers.