The Vauxhall Astra 1.7 CDTi 130hp ((J) - 2009 - 2015) produces 130bhp and 300Nm in standard form. Our Stage 1 ECU tuning file raises output to 165bhp and 350Nm, a gain of 35bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.