The Audi A8 6.3 W12 500hp (D4 - 2010 - 2016) produces 500bhp and 625Nm in standard form. Our Stage 1 ECU tuning file raises output to 560bhp and 675Nm, a gain of 60bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.