The Volkswagen Golf 1.4 TSI 140hp (CAVD) (Mk5 - 2003 - 2008) produces 140bhp and 220Nm in standard form. Our Stage 1 ECU tuning file raises output to 200bhp and 300Nm, a gain of 60bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.