The Bentley Mulsanne 6.75 V8 Bi-Turbo 537hp (upto 2016) produces 537bhp and 1100Nm in standard form. Our Stage 1 ECU tuning file raises output to 700bhp and 1400Nm, a gain of 163bhp and 300Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.