The BMW 1 Series 120i 177hp (1598cc) (F20 - 2015 - 2018) produces 177bhp and 250Nm in standard form. Our Stage 1 ECU tuning file raises output to 220bhp and 310Nm, a gain of 43bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.