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As the story goes, when the Corvette ZR-1 came out in 1990, Dick Guldstrand saw an opportunity to create his vision of the perfect Grand Sport ride, instead of his name just getting slapped onto another Chevrolet product. He asked GM for fifteen ZR-1’s and some money. He got one car and permission to do whatever he wanted to do with it. And that’s exactly what he did. Called the "GS90", Dick's car would prove to be the most elaborate and expensive specialty Corvette ever built.
The Duntov Turbo was built as a partnership between American Custom Industries (ACI), a company known for building replacement Corvette body panels, and Zora Arkus-Duntov. It was developed as a highly-stylized convertible sports car based on the production model Corvette. Each of the special Duntov Turbo's also came with a turbocharged V8.
Genovation GXE C7 Corvette Stingray
Genovation Cars unveiled an electric Corvette with more power under its hood than a Dodge Challenger Hellcat. They call their car the Genovation GXE, and it is an EV (electric vehicle) variant of the seventh-generation Corvette. The company decided that they would replace the factory LT1 engine found in all base-model C7 Corvettes with a pair of electric motors that, when working in conjunction with each other, provide over 800 horsepower and 700 pound-feet of torque. 
1997 Callaway C12 Corvette Silver
Callaway has built a firm reputation for producing some of the most sophisticated and advanced Corvette-based automobiles. Introduced in 1998, Callaway’s C12 continued this proud legacy. Designed, developed and constructed by two top German engineering and development companies, Callaway and IVM, the C12 was intended as a bespoke, high-performance car that offered its occupants a civilized interior and relaxed ride. One of the most respected Corvette super-cars ever.
The Specialty Engineering Group (SVE) has partnered with Chevy to create the 2019 Yenko/SC Corvette Stage II. This new Corvette, which is the creation of Specialty Vehicles Engineering in cooperation with Chevrolet, delivers an incredible 1000 horsepower and 875 lb-ft of torque. Better yet, it's an option that you can order from your local Chevy dealership.