The Citroen C4 Aircross 1.6i 117hp (2012 ->) produces 117bhp and 154Nm in standard form. Our Stage 1 ECU tuning file raises output to 127bhp and 170Nm, a gain of 10bhp and 16Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.