The Volkswagen Jetta 1.4 TSI 122hp (2011 - 2014) produces 122bhp and 200Nm in standard form. Our Stage 1 ECU tuning file raises output to 155bhp and 270Nm, a gain of 33bhp and 70Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.