The Audi Q8 55 TFSI-e Quattro 381hp (2018 ->) produces 381bhp and 600Nm in standard form. Our Stage 1 ECU tuning file raises output to 420bhp and 660Nm, a gain of 39bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.