2019 ->
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Order This File Ask a QuestionThe BMW 8 Series GC 850i 530hp (2019 ->) produces 530bhp and 750Nm in standard form. Our Stage 1 ECU tuning file raises output to 650bhp and 880Nm, a gain of 120bhp and 130Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.