Shares of Tesla popped 4% in Friday’s pre-market trade to $375 apiece after the electric vehicle maker unveiled a redesigned Roadster powered by rocket-style thrusters developed in collaboration with SpaceX, whose shares climbed 1%.Tesla CEO Elon Musk unveiled what he described as a “flying” car, equipped with thrusters, during a livestreamed event at his SpaceX rocket company's facility on Thursday.