E46 - 1998 - 2005
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Order This File Ask a QuestionThe BMW M3 M3 343hp (E46 - 1998 - 2005) produces 343bhp and 365Nm in standard form. Our Stage 1 ECU tuning file raises output to 365bhp and 390Nm, a gain of 22bhp and 25Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.