It’s not every day that you get to see a parade of subtly camouflaged Porsche prototypes parked one behind the other on the streets let alone away from Germany and in San Francisco.
If you watch the two videos posted after the break, you will see the new generations of the 911 Convertible, 911 Turbo, Cayman coupe and Boxster roadster, none of which have been revealed yet.
Our best guess is that Porsche held a special driving event either for journalists or North American dealers (perhaps both).
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