The Volkswagen Golf 1.4i 75hp (Mk4 - 1997 - 2003) produces 75bhp and 128Nm in standard form. Our Stage 1 ECU tuning file raises output to 83bhp and 142Nm, a gain of 8bhp and 14Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.