11. Cadillac Allanté
The Cadillac Allanté, produced from 1987 to 1993, featured bodies designed and built by the Italian coachbuilder Pininfarina. These bodies were then shipped to Cadillac’s Detroit-Hamtramck Assembly plant for final assembly. This unique production process, known as the “Allanté Air Bridge,” involved transporting the bodies via specially equipped Boeing 747s, making it one of the most complex and costly manufacturing operations in automotive history. (hemmings.com)