The Porsche Cayenne 4.5 V8 Turbo 450hp (955 - 2002 - 2007) produces 450bhp and 620Nm in standard form. Our Stage 1 ECU tuning file raises output to 500bhp and 750Nm, a gain of 50bhp and 130Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.