The Excalibur automobile was a car styled after the 1928 Mercedes-Benz SSK by Brooks Stevens for Studebaker. Stevens subsequently formed a company to manufacture and market the cars, which were conventional under their styling.
A prototype premiered at car shows in 1963, fitted on a Studebaker chassis and using a 290-brake-horsepower (290 PS; 220 kW) Studebaker 289 V-8. Studebaker ceased engine production in December 1963 and transitioned all manufacturing to its Hamilton, Ontario plant, ending the availability of that engine.
Stevens subsequently obtained engines from General Motors through his friends, GM executives Ed Cole and Semon "Bunkie" Knudsen. These were Chevrolet 327s in 300-brake-horsepower (300 PS; 220 kW) Corvette tune, making the 2,100-pound (950 kg) Excalibur a strong performer. With the standard 3.31:1 rear axle, acceleration from 0–60 mph (0–97 km/h) took less than six seconds. Projected top speed was 134 mph (216 km/h).
Cependant, la production chuta à 90 voitures pour 1975, pour littéralement s’envoler les années suivantes : 184 en 1976, 237 en 1977, 263 en 1978 et 367 en 1979.