This is an update to a previous build we did on a BMW 530. The vehicle had a Sundown Audio Z-12 Sub installed. Since the trunk is completely sealed off in the BMW, it was loud, but could of been louder. So we redid the subwoofer portion and swopped the one Z sub for 2 10" SA subs. We then cut out the rear deck and fired the subs and port directly inside of the car. The end result was loud as hell. The enclosure was topped off with plexiglass window inside the trunk with LED lighting. The new rear deck comes with a custom cut-out wrapped in suede and accented with grille metal mesh.