The Porsche Cayenne S 4.5 Turbo 520hp (955 - 2002 - 2007) produces 520bhp and 720Nm in standard form. Our Stage 1 ECU tuning file raises output to 560bhp and 800Nm, a gain of 40bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.