The Volkswagen Golf 1.6 FSI 110hp (Mk4 - 1997 - 2003) produces 110bhp and 155Nm in standard form. Our Stage 1 ECU tuning file raises output to 120bhp and 170Nm, a gain of 10bhp and 15Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.