The Ford Mustang 5.0 V8 GT 449hp (2018 ->) produces 449bhp and 529Nm in standard form. Our Stage 1 ECU tuning file raises output to 470bhp and 560Nm, a gain of 21bhp and 31Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.