The Nissan Primastar 2.5 DCi 145hp (2002 - 2006) produces 145bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 165bhp and 400Nm, a gain of 20bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.