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: Porsche Motorsport Porsche GT4 Clubsport et MR - Gabriel Gélinas with the GT4 Clubsport at Lausitzring EuroSpeedway.