The BMW M5 4.4 V8 Bi-Turbo Competition 625hp (F90 - 2017 - 2019) produces 625bhp and 750Nm in standard form. Our Stage 1 ECU tuning file raises output to 680bhp and 850Nm, a gain of 55bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.