1988 Chevrolet Corvette Callaway Sledgehammer
Callaway has built some of the most amazing sports car upgrades in automotive history. There was one in particular that came out in the 1980s, the Corvette Callaway Sledgehammer. The Sledgehammer was built on the lackluster platform that was the C4 and took it to the next level. The styling of this Corvette was a lot more modern-looking than the standard model at the time and the performance was a lot better too (via Top Speed).
Two of the most notable features of the Callaway Corvette are the unique louvers on the sides of the car and the quad exhaust pipes coming out the back. This Corvette recorded a top speed of 254.76 mph, which at the time was one of the fastest speeds on record. If you wanted a C4 Corvette, this was the model that you wanted to own at the time.