The Citroen DS4 2.0 BlueHDI 180hp (2011 - 2015) produces 180bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 210bhp and 440Nm, a gain of 30bhp and 40Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.