The Ford Mustang GT500 5.4 V8 507hp (upto 2014) produces 507bhp and 650Nm in standard form. Our Stage 1 ECU tuning file raises output to 560bhp and 750Nm, a gain of 53bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.