The Audi A8 3.0 TDI 233hp (D3 - 2003 - 2010) produces 233bhp and 450Nm in standard form. Our Stage 1 ECU tuning file raises output to 280bhp and 575Nm, a gain of 47bhp and 125Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.