The Opel Astra 2.0 DTI 100hp ((G) - 1998 - 2004) produces 100bhp and 230Nm in standard form. Our Stage 1 ECU tuning file raises output to 125bhp and 280Nm, 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.