F36 - May/2016 ->
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Order This File Ask a QuestionThe BMW 4 Series GC 420i 184hp (F36 - May/2016 ->) produces 184bhp and 270Nm in standard form. Our Stage 1 ECU tuning file raises output to 250bhp and 440Nm, a gain of 66bhp and 170Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.