The Audi A4 45 TFSI (2.0T) 245hp (B9 - 2019 ->) produces 245bhp and 370Nm in standard form. Our Stage 1 ECU tuning file raises output to 295bhp and 445Nm, a gain of 50bhp and 75Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.