The Nissan Primastar 2.5 DCi 146hp (2007 ->) produces 146bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 172bhp and 405Nm, a gain of 26bhp and 85Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.