The Audi A8 2.5 TDI 180hp (D2 - 1999 - 2003) produces 180bhp and 370Nm in standard form. Our Stage 1 ECU tuning file raises output to 208bhp and 420Nm, a gain of 28bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.