The Dodge Magnum R/T 5.7 V8 345hp (2005 - 2008) produces 345bhp and 529Nm in standard form. Our Stage 1 ECU tuning file raises output to 365bhp and 560Nm, a gain of 20bhp and 31Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.