The Ford Mustang 2.3 EcoBoost 317hp (2015 - 2018) produces 317bhp and 434Nm in standard form. Our Stage 1 ECU tuning file raises output to 340bhp and 515Nm, a gain of 23bhp and 81Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.