The Land Rover Range Rover / RR Sport 4.4 SDV8 339hp (2012 - 2018 (L405/L494)) produces 339bhp and 740Nm in standard form. Our Stage 1 ECU tuning file raises output to 390bhp and 820Nm, a gain of 51bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.