The Porsche Cayenne S 4.8 V8 385hp (957 - 2007 - 2010) produces 385bhp and 500Nm in standard form. Our Stage 1 ECU tuning file raises output to 405bhp and 535Nm, a gain of 20bhp and 35Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.