The Audi A8 3.0 TFSI 290hp (D4 - 2010 - 2016) produces 290bhp and 420Nm in standard form. Our Stage 1 ECU tuning file raises output to 435bhp and 535Nm, a gain of 145bhp and 115Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.