The announcement from Nissan News.
Nissan/Infiniti News Room
Here is some more info.
"Additional exclusive equipment includes a high-luster smoke wheel finish, red brake calipers and 40th Anniversary badges on the rear hatch and front strut tower brace. Inside, along with the red leather-appointed seats are red door panel inserts, 40th Anniversary seatback and floormat embroidery, red stitching on the center stack, shift boot and kneepads, smooth leather steering wheel with red stitching and a plaque of authenticity. Every 40th Anniversary Z® also comes with a commemorative premium satin car cover."