The Audi S5 S5 3.0 TFSI 354hp (F5 - MK1 - 2016 - 2018) produces 354bhp and 500Nm in standard form. Our Stage 1 ECU tuning file raises output to 400bhp and 550Nm, a gain of 46bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.