The Audi A6 2.0 TDI DPF 140hp (C6 - 2004 - 2008) produces 140bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 175bhp and 380Nm, a gain of 35bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.