The Porsche Cayman GT4 can possibly be considered as the most powerful Cayman model ever produced by Porsche. It has a 3.8 liter flat six engine from the 911 Carrera S and renders 385 horsepower. It can transmit power with its six speed MT and the dynamic gearbox mounts. It can reach a top speed of 183mph. Its official unveiling will happen at the Geneva Motor Show by next month to give everyone a chance to have a better look at it. It will be made available in Porsche dealerships by July for a starting cost of $84,600.