The Citroen C1 1.0i 68hp (2005 - 2013) produces 68bhp and 93Nm in standard form. Our Stage 1 ECU tuning file raises output to 79bhp and 122Nm, a gain of 11bhp and 29Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.