The Citroen C6 2.7 HDi 208hp (2006 - 2013) produces 208bhp and 440Nm in standard form. Our Stage 1 ECU tuning file raises output to 240bhp and 520Nm, a gain of 32bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.