The BMW 3 Series 328i 230hp (E90/E91 - 2005 - 2010) produces 230bhp and 300Nm in standard form. Our Stage 1 ECU tuning file raises output to 274bhp and 325Nm, a gain of 44bhp and 25Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.