The Alpina D5 3.0 Bi-Turbo 388hp (G30/31- 2017 - 2019) produces 388bhp and 800Nm in standard form. Our Stage 1 ECU tuning file raises output to 450bhp and 850Nm, a gain of 62bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.