The Volkswagen Golf 2.5i 170hp (Mk6 - 2009 - 2012) produces 170bhp and 240Nm in standard form. Our Stage 1 ECU tuning file raises output to 190bhp and 267Nm, a gain of 20bhp and 27Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.