The Vauxhall Astra 2.0 Turbo OPC 280hp ((J) - 2009 - 2015) produces 280bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 310bhp and 450Nm, a gain of 30bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.