The BMW X4 xDrive30i 252hp (G02 - 2018 ->) produces 252bhp and 350Nm in standard form. Our Stage 1 ECU tuning file raises output to 287bhp and 450Nm, a gain of 35bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.