The Citroen C1 1.4 HDi 8V 55hp (2005 - 2013) produces 55bhp and 130Nm in standard form. Our Stage 1 ECU tuning file raises output to 81bhp and 168Nm, a gain of 26bhp and 38Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.