Built in 2017, it’s just one of several previously secret concept cars from the past 15 years shown today by the company.

If you’re into cool Porsches, you’re going to like this news. The company revealed late yesterday a collection of previously-unannounced one-off concepts to the public, giving us an inside look at what could’ve been from the past 15 years.
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https://www.caranddriver.com/news/a34657936/porsche-secrect-919-hybrid-street-concept-cars/