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The No. 4 C7.R Corvette Race Car at Sunset in Daytona Beach, Florida
The C7.R Corvette by Pratt & Miller is one of the winningest race cars in modern history. Explore what makes this Corvette a winner on race day, and discover the connection between the C7.R and the seventh-generation Chevy Corvette Z06. At the core of the C7.R Corvette is a direct carry-over from its predecessor - the same 5.5 liter engine that was developed during the C6.R's successful tenure in both the American Le Mans series and at The 24 Hours of Le Mans. 
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.
This special edition takes the upgraded handling and appearance that comes with the Grand Sport moniker and adds some special cosmetic touches for extra uniqueness. Along with a stunning gray metallic paint color, it features blue accents that harken back to previous Grand Sports. A representation of the original Grand Sport race car is embossed onto the headrests. Powered by the regular (and excellent) LT1 V-8, it features magnetic ride control, an electronic limited-slip differential, and Grand Sport wheels.
The 2017 Chevrolet Corvette Grand Sport served as the official Pace Car for the 101st Indianapolis 500 presented by PennGrade Motor Oil and led drivers to the green flag on May 28. 2017 marked the 14th time a Corvette has served as the Indianapolis 500 Pace Car, starting in 1978, and the 28th time a Chevrolet has led the field, dating back to 1948, when a 1948 Fleetmaster Six convertible paced the race.