The Land Rover Range Rover / RR Sport 4.2 V8 Supercharged 396hp (2002 - 2012 (L320/L322)) produces 396bhp and 560Nm in standard form. Our Stage 1 ECU tuning file raises output to 450bhp and 650Nm, a gain of 54bhp and 90Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.