check out:
https://www.geraldjustprojects.com/p...r-kit-4-screw/
You can keep your cluster navigation but would not retain your radio controls. Works like a charm. I have it installed as I upgraded my cluster to the 17+ on my 2013 BRZ.
This thread may provide further information:
http://www.ft86club.com/forums/showthread.php?t=129867