The BMW X4 2.8i 245hp (F26 - 2014 - 2017) produces 245bhp and 350Nm in standard form. Our Stage 1 ECU tuning file raises output to 290bhp and 450Nm, a gain of 45bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.