The Audi A6 1.9 TDI 130hp (C5 - 1997 - 2004) produces 130bhp and 285Nm in standard form. Our Stage 1 ECU tuning file raises output to 170bhp and 390Nm, a gain of 40bhp and 105Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.