The Opel Signum 2.8 Turbo 230hp (2003 - 2008) produces 230bhp and 330Nm in standard form. Our Stage 1 ECU tuning file raises output to 270bhp and 390Nm, a gain of 40bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.