The Chrysler Pacifica 4.0 V6 253hp (2004 - 2008) produces 253bhp and 355Nm in standard form. Our Stage 1 ECU tuning file raises output to 275bhp and 375Nm, a gain of 22bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.