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This Sledgehammer reached 254.76 mph at the Transportation Research Center (TRC) in Ohio and became the world’s fastest street-legal car for some time. It was built up by Reeves Callaway in Connecticut as an example of what was possible with the new ZR1 and and turbocharging its LT5 engine. The result was a 898 bhp coupe that still retained luxuries such as air conditioning and a radio. It got this power by using a NASCAR-spec block with Mahle pistons and a massive turbo.
In late 2007 Corvette Europe approached the FIA seeking approval to race a C6 Coupe in the GT4 category.  After much study the FIA approved their request.  Kroymans shipped a new 2008 C6 Z51 six-speed coupe to Callaway Competition in Leingarten, Germany. In less than six weeks the Callaway team stripped the new car of all non-essential parts including carpet and standard seats. 
Chevrolet's introduction of the LT1 in 1992 as the base engine in the Corvette phased out the L98 based Callaway Twin Turbo. Previously, Callaway Corvettes made their increased power through positive manifold pressure; now they made it through increased displacement and finesse. Initially called the CL1 or CR1, they designated the chassis they were built upon. They were based on the pushrod LT1 cars (CL1) or the 32 valve DOHC LT5 ZR-1 cars (CR1).
Callaway Competition has constructed some of the most successful GT3 race cars in history. Competing against the world’s premier marques, Callaway is currently recognized as the most successful race team of the ADAC GT Masters series. To celebrate Callaway Competition’s 25th anniversary, we’re building 25 unique, specially-equipped “Callaway Champion” road cars. The Z06-based Champions are built by our expert craftsmen.
Reeves Callaway has always had a dream of competing a Corvette of his own at the 24 Hours of Le Mans, France. The idea begin with the body work for a street version, but one thing led to another, and a full race version was completed as well. The street version is almost identical to the race version because the hood, tail, rocker panels, and lower door halves, are all made of carbon fiber, just like the race version.
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.
In the tradition of coach built shooting brakes, Callaway offers the AeroWagen for any version of the C7 Corvette Coupe. Its components can be fitted to the standard production C7, the Callaway SC627 Stingray or Grand Sport, or the Callaway SC757 Z06. The AeroWagen hatch assembly is a part-for-part replacement of the original equipment Corvette rear hatch, using the original hardware and latching mechanisms. It operates in an identical fashion.
Corvette GT3 C6 Z06-R
During the summer of 2005, a decision was made to transform selected Z06 road cars into a new breed of racer to compete in the world's top GT3 championships. The first series to introduce this new GT3 class was the SRO and FIA's GT3 Championship. Based on their racetrack test results, Team Carsport saw instant potential in the car. Hezemans contracted Callaway Competition in conjunction with Koos Pettinga, manager at Corvette Europe, to convert the street Z06 into a Z06R GT3.
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.
The 2005-2013 Callaway Corvette was a specialist version of the C6 Corvette, built by Callaway Cars expert craftsmen and sold through selected Callaway/Chevrolet dealers. The 17th “C-Project” undertaken by Callaway first produced naturally-aspirated SuperNatural™ 450, 461, 490 (6.0L) and 550 (6.8L & 7.0L) horsepower Callaway Corvettes. In February 2006, Callaway returned to its positive manifold pressure roots, introducing Callaway “SuperCharged” Corvettes.