F40 - 2019 ->
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Order This File Ask a QuestionThe BMW 1 Series M135i 306hp (F40 - 2019 ->) produces 306bhp and 450Nm in standard form. Our Stage 1 ECU tuning file raises output to 335bhp and 500Nm, a gain of 29bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.