The Citroen C3-XR 1.6 THP 167hp (2014 - 2018) produces 167bhp and 245Nm in standard form. Our Stage 1 ECU tuning file raises output to 190bhp and 320Nm, a gain of 23bhp and 75Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.