The twin hump rear deck design of this 718 version is virtually a carry over from the 981 model. Here is my 981 Spyder next to our 981 Boxster S showing the difference in the rear decks. The rear spoiler on the 718 looks smaller and this will be down to the incorporation of the already raised section of the standard 718 model where the Porsche lettering sits. Apparently Oliver Blume, CEO of PAG, was asked - at the recent PCA Porsche Parade event by a RT member - if the forthcoming 718 Spyder would have a NA engine and he replied that it would.