The BMW X6 3.5D 286hp (E71 - 2008 - 2014) produces 286bhp and 580Nm in standard form. Our Stage 1 ECU tuning file raises output to 340bhp and 680Nm, a gain of 54bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.