Callaway Sledgehammer – 255 MPH
The Callaway Sledgehammer is, in essence, a tuned C4 generation Corvette. In reality, it’s really a specially modified version, of a modified version of the Chevrolet Corvette, created as a testbed for turbocharging Chevrolet’s 350 cubic inch V8.

Photo by National Corvette Museum/YouTubeCallaway cars commissioned a special low-drag body, called the AeroBody and boosted the ‘Vette’s motor to 898 horsepower. The result was a 255 mph Corvette that still had its stock interior, radio, air conditioning, and power sport seats.