The Audi A4 2.0 TDI DPF 136hp (B7 - 2004 - 2008) produces 136bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 185bhp and 400Nm, a gain of 49bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.