The BMW 3 Series 330i 231hp (E46 - 1998 - 2005) produces 231bhp and 300Nm in standard form. Our Stage 1 ECU tuning file raises output to 250bhp and 325Nm, a gain of 19bhp and 25Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.