The Porsche Cayman GTS 4.0 400hp (2016 -> ( 718 )) produces 400bhp and 420Nm in standard form. Our Stage 1 ECU tuning file raises output to 440bhp and 440Nm, a gain of 40bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.