This only applies to '81-'87/'88 37 & 47 coupes with them being attached frm the outside unlike the '78-'80 37 & 47, all 07 & 27 coupes.I ask because I've read that the rear 1/4 windows are slightly different, the seals actually. Apparently they're a bit thicker to hide a gap that would be there without the vinyl top. Without replacing the windows you can just use butyl tape, or "dum dum".