The Porsche Cayman 3.4i 325hp (2013 - 2015 ( 981 )) produces 325bhp and 370Nm in standard form. Our Stage 1 ECU tuning file raises output to 340bhp and 390Nm, a gain of 15bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.