The BMW 4 Series M440i 374hp (G22 LCI - 2024 ->) produces 374bhp and 500Nm in standard form. Our Stage 1 ECU tuning file raises output to 460bhp and 620Nm, a gain of 86bhp and 120Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.