The Opel Zafira 2.0 CDTi 170hp ((C) - 2011 - 2016) produces 170bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 195bhp and 450Nm, 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.