The BMW 3 Series 318i 156hp (G2x - 2019 ->) produces 156bhp and 250Nm in standard form. Our Stage 1 ECU tuning file raises output to 260bhp and 420Nm, a gain of 104bhp and 170Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.