The Audi A8 3.3 TDI V8 225hp (D2 - 1999 - 2003) produces 225bhp and 480Nm in standard form. Our Stage 1 ECU tuning file raises output to 265bhp and 550Nm, a gain of 40bhp and 70Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.