https://www.pca.org/news/2015-10-06/porsche-announces-cayman-gt4-clubsport-race-car Looks like the serious track version of the GT4.
the club sport has been shipping for several months now...it was raced during 2016 Daytona race week, should have more GT4 racing in the upcoming Continental tire events, as the cars were late arriving to the teams for a full race prep