The Citroen DS4 1.6 THP 210hp (2015 ->) produces 210bhp and 285Nm in standard form. Our Stage 1 ECU tuning file raises output to 230bhp and 360Nm, a gain of 20bhp and 75Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.