The BMW 3 Series 335D xDrive 313hp (F3x - 2011 - 2015) produces 313bhp and 630Nm in standard form. Our Stage 1 ECU tuning file raises output to 365bhp and 710Nm, a gain of 52bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.