The Audi A6 1.9 TDI 110hp (C5 - 1997 - 2004) produces 110bhp and 235Nm in standard form. Our Stage 1 ECU tuning file raises output to 140bhp and 310Nm, a gain of 30bhp and 75Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.