The BMW M6 V8 4.4 Bi-Turbo Competition 600hp (F06/F12/F13 - 2011 ->) produces 600bhp and 700Nm in standard form. Our Stage 1 ECU tuning file raises output to 680bhp and 850Nm, a gain of 80bhp and 150Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.