Those are actually technically trim levels of the 911 rather than model names. We may eventually add a trim dropdown, but it’s more difficult for us than for a site like cargurus or cars.com, since we aggregate from many sources, whereas they get their listings directly from dealers (and so they can specify the format).

That said, you can already find what you’re looking for by choosing 911 from the model box, and then in the keywords field, put the trim level you want, in quotes, like “Turbo S” or “4S”.