A vehicular muffler has a body with endcaps mounted on opposed ends thereof. The body has an outer wrap and an inner wrap. The outer wrap is sheet metal having opposed edges overlapping each other to form a closed figure. The opposed overlapping edges are an outer edge and an inner edge. The inner wrap is sheet metal having opposed margins overlapping each other. The opposed margins are an inner margin and an outer margin. The inner margin has a portion adjacent to the inner edge. The outer margin is positioned between the inner margin and the outer wrap to form a gap between the terminus of the outer margin and the terminus of the inner edge.