The company was headquartered in Warren, Michigan, in the United States and was one of several coach convertible builders.
ASC sold assets to its Creative Services division in late 2016 to Roush Industries.
In late June 2017, ASC effectively ceased operations, laying off all staff and had tooling and production equipment removed from the manufacturing plant in Lexington, Kentucky.
In 2004, the aftermarket sunroof business was sold to Inalfa, and the company changed its name from American Sunroof Company to American Specialty Cars, with a "new emphasis on handling design, engineering and manufacturing of low-volume niche vehicles".
and an ASC/McLaren Pontiac Turbo Grand Prix[5] From 1989, ASC manufactured the Porsche 944 Cabriolet at its factory in Weinsberg, Germany.