I made a long freeway trip from Ventura to San Diego last week. When I unloaded the trunk I found that the bags that had been sitting just right of center and more forward were very, very warm to the touch where they had been in contact with the trunk floor. The "hot spot" seems to be inboard and forward of where the muffler is located. The heat was enough that I might be concerned about carrying certain items (sensitive electronics, food stuffs, etc) in that spot. Is this normal? The car has a completely stock exhaust system on it.