Ok so I wanted to keep the orignal speaker grills on the interior. I realize that I may get negative feedback back on what I used for the rear speakers, but it worked. I used 1/2" spacers on the front to pull the speaker magnets away from the window slide, with same size screws but longer. With 5 1/4" speaker from pioneer, then on the rear the same but 4" speakers, and used....here it goes....plastic toilet flanges.