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The 25th Anniversary Edition is a hardened up version of Callaway's Corvette SC757, which in turn is based on a C7-generation Corvette Z06. It features a supercharged V8 that pumps out 757-horsepower and 777 pound-feet of torque. The supercharger is a GenThree Callaway unit with the company's TripleCooled intercooler system. A high-flow intake system feeds that beast. Callaway's Level Two HD Cooling System also helps it avoid the overheating issues that plagued C7 Z06s.
The major differences between the 1980 and 1982 Daytona and the 1981 GTO are the hood, the tops of the rear fenders, and the rear spoiler/bumper cover. The Daytona had an elaborate, short vertical fin on top of the rear fender that turned several turns “in and back,” flowing to the wide, long, table-like rear spoiler. The GTO’s rear fenders pontoons are the same as.
To commemorate its quarter-century milestone, Callaway Cars collaborated with Chevrolet, arranging a production run of 25 uniquely prepared 2012 Corvette Grand Sport coupes and convertibles. General Motors supplied special parts and procedures on the Bowling Green production line to facilitate final assembly at Callaway factories. Then, the performance and identity components are installed by Callaway. The 25th Anniversary Edition produced 620 bhp and 555 lb-ft of torque.
For the 2014 model year, the Chevrolet team sculpted the seventh-generation Corvette into the most sophisticated, most feature-packed Corvette produced to date. Facing a daunting challenge, new technology enabled Callaway engineers to produce breathtaking power with seamless transition into and out of positive manifold pressure. Entirely new, Callaway’s patented GenThree supercharger design improved airflow quality and increased charge air cooling capacity.
The "Asteroid" started life as a 1963 Chevy Corvette.  It was ordered by mechanical engineer and renowned mid-century speed boat racer Bob Nordskog, sans any exterior paint save for a primer coat.  Instead, the car was shipped directed to Barris Kustoms with instructions for Barris to transform the brand-new Corvette into a more radical version of itself.