The Citroen C5 2.0 HDI 163hp (2008 - >) produces 163bhp and 340Nm in standard form. Our Stage 1 ECU tuning file raises output to 190bhp and 400Nm, a gain of 27bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.