The Alpina D5 D5 Bi-Turbo 350hp (F10/11 - 2010 - 2016) produces 350bhp and 700Nm in standard form. Our Stage 1 ECU tuning file raises output to 390bhp and 750Nm, a gain of 40bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.