The Vauxhall Vivaro 2.5 CDTi 114hp (2001 - 2014) produces 114bhp and 290Nm in standard form. Our Stage 1 ECU tuning file raises output to 149bhp and 370Nm, a gain of 35bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.