The Bentley Bentayga S 4.0 V8 TDI 435hp (2016 - 2019) produces 435bhp and 900Nm in standard form. Our Stage 1 ECU tuning file raises output to 510bhp and 1000Nm, a gain of 75bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.