For the record, the empeg is DIN compliant. There are just two standards, colloquially E-DIN and J-DIN. Most European cars have E-DIN slots that fit the empeg. On big-name aftermarket stereos these days, you use the sleeve with the bend-out tabs to install them. Most Asian cars have J-DIN slots. Big-name stereos are installed in them by throwing away that sleeve and screwing the stereo directly into a bracket of some nature. Given that screwing the empeg into the dash is less than useful for a stereo that needs to be removable, J-DIN doesn't seem appropriate.

I don't know which standard is the official one. Perhaps both.