The Bentley Continental GTC 4.0 TFSI V8 550hp (All) produces 550bhp and 770Nm in standard form. Our Stage 1 ECU tuning file raises output to 640bhp and 900Nm, a gain of 90bhp and 130Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.