The Opel Astra 2.0 DI 82hp ((G) - 1998 - 2004) produces 82bhp and 185Nm in standard form. Our Stage 1 ECU tuning file raises output to 107bhp and 235Nm, 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.