There is no "GEN6".
This has been discussed and confirmed previously.
Per the official SHO Club.
Just FYI.
GEN4 is: 2010-2012 model year's.
GEN5 is: 2013-current.
I wish Ford would invest in, and produce a GEN6.... but with the demise and slaughtering of so many of their sedans, doesn't look promising, that's for sure.