The BMW 1 Series M140i 340hp (F20 - 2015 - 2018) produces 340bhp and 500Nm in standard form. Our Stage 1 ECU tuning file raises output to 400bhp and 600Nm, a gain of 60bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.