The BMW 4 Series 435xD 313hp (F32/33 - 2013 - 2016) 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.