The Porsche 911 Turbo 540hp (2016 - 2018 (991.2)) produces 540bhp and 660Nm in standard form. Our Stage 1 ECU tuning file raises output to 640bhp and 820Nm, a gain of 100bhp and 160Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.