Pontiac Banshee XP-8331 Prototype, 1964. The one-off concept designed under John Z De Lorean’s leadership of Pontiac is for sale. The XP-8331 was the first of 4 Banshee prototypes but GM management feared the 6-cylinder coupé would cannibalise Corvette sales and the Pontiac project was sidelined. This first version has travelled 1498 miles and is for sale for $750,000
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