Dodge doubled its new Durango offerings at the Chicago Auto Show with the launch of the Heat performance package that joins the R/T model. The two trim levels share most of their exterior and interior appointments as well as suspension tweaks, but whereas the R/T gets a 360-horsepower 5.7-liter HEMI V8, the Heat is fitted with a 3.6-liter Pentastar V6 delivering 295 ponies and 260 lb.-ft. (353 Nm