Porsche GT4 Clubsport and Clubsport MR: Two Race Cars Derived from the Porsche Cayman Coupe Published on September 28, 2016 in First Drives by Gabriel Gélinas Photo: Gabriel Gélinas Porsche GT4 Clubsport in preparation in the Lausitzring EuroSpeedway garages. This racing version weighs 40 kg less than the production version of the Porsche Cayman GT4.