The Vauxhall Omega 2.5 DTI 150hp ((B) 1997 - 2003) produces 150bhp and 300Nm in standard form. Our Stage 1 ECU tuning file raises output to 175bhp and 350Nm, a gain of 25bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.