The Citroen C4 2.0i 16v vts 180hp (2004 - 2010) produces 180bhp and 202Nm in standard form. Our Stage 1 ECU tuning file raises output to 194bhp and 228Nm, a gain of 14bhp and 26Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.