World's Largest Automotive Assembly Supplier Chooses St. Charles County for New Facility
Piston Automotive, the world's largest automotive assembly supplier, has chosen St. Charles County for its newest facility. In late 2022, the Detroit-based manufacturer will open a $10 million facility in Wentzville that is projected to create over 200 new jobs.
Piston recently won a contract from General Motors to assemble a wide variety of parts for

