F32/33 - May/2016 - 2019
Ready to order this tuning file? Access the ByteFlash Portal to place your order.
Order This File Ask a QuestionThe BMW 4 Series 420i 184hp (F32/33 - May/2016 - 2019) 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.