The Land Rover Discovery 2.5 TD5 137hp (1998 - 2004) produces 137bhp and 300Nm in standard form. Our Stage 1 ECU tuning file raises output to 160bhp and 350Nm, a gain of 23bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.