The Citroen C5 2.0 HDiF FAP 136hp (2001 - 2008) produces 136bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 163bhp and 380Nm, 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.