The Citroen DS4 1.6 BlueHDI 8V 120hp (2011 - 2015) produces 120bhp and 300Nm in standard form. Our Stage 1 ECU tuning file raises output to 140bhp and 350Nm, a gain of 20bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.