The Audi TT 45 TFSI 245hp (2018 -> ( 8S II )) produces 245bhp and 370Nm in standard form. Our Stage 1 ECU tuning file raises output to 320bhp and 450Nm, a gain of 75bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.