The Citroen C4 1.4 VTi 95hp (2010 - 2015) produces 95bhp and 135Nm in standard form. Our Stage 1 ECU tuning file raises output to 105bhp and 150Nm, a gain of 10bhp and 15Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.