The Chrysler 300C 5.7 Hemi V8 340hp (2004 - 2011) produces 340bhp and 525Nm in standard form. Our Stage 1 ECU tuning file raises output to 360bhp and 545Nm, a gain of 20bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.