The BMW 3 Series 320i 150hp (E90/E91 - 2005 - 2010) produces 150bhp and 200Nm in standard form. Our Stage 1 ECU tuning file raises output to 175bhp and 215Nm, a gain of 25bhp and 15Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.