Wonderbar:

And forgive me for asking again, why the nomenclature "991"?  Why not "998"? 

It just gives Porsche more time before they have to leave the 900-series (they'll go back and use all the unused numbers).
 


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73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs).  Former: 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550 Maranello