There is only one of these Calloway Sledgehammer Corvette cars at the moment that I know of. Callaway at the time of building this one said they could/would make another or others for 400,000. US dollars. The top speed of 254.76 MPH was attained by John Lingenfelter as the driver, and apparently was not an official documented recorded speed. Although the production was only limited to one, I am sure that if more people who bought much more expensive vehicles would have weighed the overall package, they may have bought one of these. After all it still is a small block Chevy, okay a 880 H.P. one at that...lol. Lets not forget that this car is 17 years old too.

 

I remember reading about this car in Road and Track and drooling. All those vents are to cool the engine due to the huge honking twin turbos

 

Callaways are wicked. I'll take a C12 in white please