Pretty sure the 2015 model came standard with this seat. It has an separate lumber support that sits in the middle of your lower back. Well comfortable.
My 2014 T Bird. The tank got damaged transporting it on a trailer so I had to repair and paint it. Not stock color but I left the top of the tank original and blended the new paint where the pinstriping is. These pix are before the repair.
Finally fitted and tested out my fly screen from MadStad. Very solid mounting with quality fittings. Some buffeting at high speed, but happy with look and performance