Porsche has begun real-world testing of technology from its Mission R electric race car concept in a Cayman-based prototype. The Porsche 718 Cayman GT4 ePerformance combines the body shell from the 718 Cayman GT4 Clubsport racer with the Mission Rโs powertrain and battery tech, Porsche explained Monday in a press release. That means the Cayman GT4โฆ
