A track-ready Cayman was said to be rumor-only from Porsche for many years, until 2016 that is, when Porsche unvieled the Cayman GT4 Clubsport at the LA Autoshow. This GT4 Clubsport is a beautiful car in pristine condition serviced exclusively by Kelly-Moss Road and Race throughout it's life.
Full listing with more info here: https://www.viccicarauctions.com/detail/2016-porsche-cayman-gt4-clubsport-140472