This particular model, #55 of the 400 built.
A rare 1988 Chevrolet Corvette Callaway Twin Turbo, one of only 400 modified by Callaway Cars, is now up for auction on Bring A Trailer. It showcases the unique performance enhancements that made Callaway a legendary name in the world of American sports cars.
The Callaway twin-turbo conversion was a special option available through select Chevrolet dealers from 1987 to 1991 under the Regular Production Code (RPO) B2K. Once ordered, Corvettes were shipped directly from Chevrolet’s Bowling Green assembly plant to Callaway’s facilities in Old Lyme, Connecticut, where the transformation took place. This example was initially ordered by Landmark Chevrolet in Houston, Texas, and has since made its way through several states before being acquired by the selling dealer in New York in 2024.
At the heart of this Corvette is a twin-turbocharged 5.7-liter L98 V8 engine, modified by Callaway to produce 382 horsepower and a staggering 562 lb-ft of torque. The conversion included several key upgrades such as proprietary .006″-oversized pistons, a forged crankshaft, Clevite bearings, and stainless-steel valves. The twin turbochargers feature integrated wastegates and dual intercoolers, which are fed through distinctive hood ducts. The engine's lower compression ratio of 7.5:1 ensures it can handle the increased power output, making this car a formidable performer even by today’s standards.
Power is sent to the rear wheels through a Doug Nash “4+3” four-speed manual transmission with automatic overdrive on the top three gears, paired with a limited-slip differential. This setup not only provides the driver with engaging manual control but also the convenience of overdrive for cruising. The car is equipped with the Z51 Performance Handling package, which includes upgraded suspension components and anti-lock four-wheel disc brakes, ensuring it can handle the power with confidence.
This Corvette is finished in Charcoal Metallic with a matching Callaway Aerobody kit, which includes front and rear fender vents, polished quad exhaust outlets, and Callaway badging. The car rides on 17″ Callaway-branded Dymag wheels fitted with 275/40 Michelin Pilot Sport tires. The removable roof panel, a signature feature of the C4 Corvette, shows a minor scuff, but otherwise, the exterior presents well.
Inside, the cabin is outfitted with power-adjustable Sport bucket seats upholstered in gray leather, accompanied by color-coordinated carpets and door panels. Modern conveniences such as power windows, automatic climate control, a Delco-Bose sound system, and an onboard computer are all present. A Callaway boost gauge is mounted on the center stack, complementing the digital instrument panel that includes a speedometer, tachometer, and fuel-level display, among others.
This Corvette comes with a comprehensive package of documentation, including a window sticker, Callaway literature, NCRS awards and paperwork, and Connecticut registration. The car’s history is further authenticated by a plaque on the center console identifying it as #55 of the 1988 model year production and the Service Parts Identification decal displaying the B2K option code.
With 23,000 miles on the odometer, this Callaway Twin Turbo Corvette is a well-preserved example of a rare and highly sought-after performance vehicle from the late 1980s. It represents a unique chapter in Corvette history, combining the best of American muscle with the precision engineering of Callaway Cars.
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