Racer turned driving instructor Reeves Callaway bolted a turbo system on a BMW 320i and loaned the car to Car and Driver journalist Don Sherman who wrote a one page article on the beast. At the time, the number of folks who had the capability to turbocharge a car without grenading the engine was extremely limited and in 1977 Callaway Cars was incorporated to develop aftermarket turbo kits for the mass market. Several years later, Callaway was working closely wtih OEMs to develop turbo systems for BMW, Volkswagen, Porsche, Audi, Mercedes-Benz and Chevrolet, many of which maintained factory backed warranty. Callaway eventually became world renowned for his bonkers twin turbo Corvettes, and this is an example from the first year of Callaway C4 production. Find this 1987 Chevrolet Corvette Callaway Twin Turbo offered for $22,900 in Medford, OR. Tip from FuelTruck.
1987 was the first year that you could selection regular production option (RPO) B2K at your local Corvette dealer, and several weeks later you would receive a twin turbocharged Corvette with an MSRP starting at $50k. The seller of this one claims a new purchase price was $80k.
When new, the entire C4 was shipped directly to Callaway's Old Lyme, CT facility where its 5.7 liter V8 was built into a twin turbocharged beast pushing out 345 horsepower and 465 ft-lbs of torque.
The C4 retains its original digital gauge setup, which is either a total put off, or radical depending on where you stand on silly gauges from the 80s. Personally, I this is the dash that Elon Musk should have baselined for the Tesla, but instead he put a giant iPad as the center console.