The Citroen C4 1.5 BlueHDI 110hp (2020 ->) produces 110bhp and 250Nm in standard form. Our Stage 1 ECU tuning file raises output to 140bhp and 300Nm, a gain of 30bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.