The Audi A4 1.9 TDI 110hp (B5 - 1995 - 2001) produces 110bhp and 240Nm in standard form. Our Stage 1 ECU tuning file raises output to 143bhp and 320Nm, a gain of 33bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.