The Opel Vivaro 2.5 CDTi 145hp (2001 - 2014) produces 145bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 172bhp and 405Nm, a gain of 27bhp and 85Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.