The Citroen C5 2.0 HDiF 138hp (2001 - 2008) produces 138bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 170bhp and 400Nm, 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.