Porsche’s lineup of 911s in the U.S. is already quite extensive: There are the Carrera, the Carrera S, the Carrera and Carrera S cabriolets, the Carrera 4 and 4S, the Carrera 4 and 4S cabriolets, the Turbo and Turbo S, the Turbo and Turbo S cabriolets, the 50th Anniversary edition, and the GT3. Yet it [...]