The BMW 1 Series 128ti 265hp (F40 - 2019 ->) produces 265bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 310bhp and 500Nm, 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.