The Citroen C6 3.0 HDi 207hp (2006 - 2013) produces 207bhp and 450Nm in standard form. Our Stage 1 ECU tuning file raises output to 290bhp and 500Nm, a gain of 83bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.