Manufactured scarcity works in the automotive industry. Whether it’s an Italian supercar firm building more cars than the dashboard-mounted placards imply, or Chevrolet bumping out more limited-edition Corvettes faster than New Balance can supply owners with pearly-white sneakers, it grabs the attention of loyalists fast. During the final round of Dodge’s effort to rid its shelves of Hemi V8 engines, the company packed them into multiple limited-edition models as part of the brand’s “Last Call” campaign. And you know what happened? It worked.