1963 Chevrolet Corvette C2 RPO Z06
The original Z06 concept car was created by Zora Arkus Duntov and it was internally named the (Regular Production Option). The thing that truly separated this Corvette from the rest of the pack was the 372 L84, fuel-injected engine that was under the hood. The amount of power and performance that this Corvette had over the standard production model was awe-inspiring (via Top Speed).
The RPO Z06 proved to be a very popular option and thus became one of the rarest examples of a Corvette. The power and performance that you got coupled with the attractive styling was enough to win just about any driver over. There were only 199 examples of this Corvette that were ever produced which made it one of the rarest models on the road.