The Land Rover Defender P425 (5.0) 425hp (2019 ->) produces 425bhp and 550Nm in standard form. Our Stage 1 ECU tuning file raises output to 560bhp and 700Nm, a gain of 135bhp and 150Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.