The Citroen DS5 2.0 HDI 136hp (2011 - 2015) produces 136bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 170bhp and 380Nm, a gain of 34bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.