The Ford Mustang GT 4.6 V8 319hp (upto 2014) produces 319bhp and 440Nm in standard form. Our Stage 1 ECU tuning file raises output to 339bhp and 470Nm, a gain of 20bhp and 30Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.