The Fiat 500 X 1.0 Firefly Turbo 120hp (2019 ->) produces 120bhp and 190Nm in standard form. Our Stage 1 ECU tuning file raises output to 140bhp and 230Nm, a gain of 20bhp and 40Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.