The BMW X6 M 555hp (F16 - 2014 - 2018) produces 555bhp and 680Nm in standard form. Our Stage 1 ECU tuning file raises output to 610bhp and 800Nm, a gain of 55bhp and 120Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.