The Ford F-250 6.4 V8 350hp (upto 2020) produces 350bhp and 881Nm in standard form. Our Stage 1 ECU tuning file raises output to 390bhp and 930Nm, a gain of 40bhp and 49Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.