The BMW 1 Series 120i 184hp (1998cc) (B48B20B) (F20 - 2015 - 2018) produces 184bhp and 290Nm in standard form. Our Stage 1 ECU tuning file raises output to 250bhp and 440Nm, a gain of 66bhp and 150Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.