The Audi A6 5.2 FSI 435hp (C6 - 2008 - 2010) produces 435bhp and 540Nm in standard form. Our Stage 1 ECU tuning file raises output to 460bhp and 565Nm, a gain of 25bhp and 25Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.