The then-new C4 generation Corvette was good, but any serious belief it would give these models a run for their money was a joke. Yet in 1988, Callaway Cars, a small American tuning company led by ...

Customers could order a 1987 or later C4 Corvette with over 390 horsepower, 150 more than the car's stock 240 horsepower output. In 1988, Callaway created The Sledgehammer, the world’s fastest ...

According to the dyno (right), Callaway's Corvette reaches its peak 627 hp at 6,400 rpm, an additional 167 hp over the standard car and 23 hp less than the upcoming Z06.The Callaway's max 610 lb ...

While the 6.2-liter LS3 V8 in the previous-generation C6 Corvette packed 430 horsepower in base form, the new LT1 in the Stingray displaces the same but comes standard with 455 hp. So Callaway has ...

Prices shown are the prices you can expect to pay for a 2012 Callaway Cars Inc Corvette Grand Sport SC606 2 Door Coupe across different levels of condition. Edit options.

The Callaway "Sledgehammer", a heavily modified 1988 Corvette C4, became the fastest street-legal car in the world with a top speed of 254.76 mph. Not only did it beat every exotic of its era ...