The Bentley Bentayga 4.0 V8 Bi-Turbo 550hp (2016 - 2019) produces 550bhp and 770Nm in standard form. Our Stage 1 ECU tuning file raises output to 620bhp and 870Nm, a gain of 70bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.