The Audi A4 1.9 TDI 115hp (B7 - 2004 - 2008) produces 115bhp and 285Nm in standard form. Our Stage 1 ECU tuning file raises output to 150bhp and 340Nm, a gain of 35bhp and 55Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.