This plant manufactured spark plugs, air, oil and fuel filters, instrument clusters and other parts. It opened around the mid-1920s in the former Dort (automobile) plant. The Dort Highway plant became known as Flint East when AC took over the old Chevrolet manufacturing operations on Chevrolet Avenue in 1987. In 1988 AC Spark Plug merged with GM's Rochester Products Division, and was renamed AC Rochester. World headquarters remained in Flint, soon moving to the Great Lakes Technology Center. In the late 1980s, parts of Flint East were turned over to GM's Delco Electronics. In 1994, AC Rochester merged with Delco Remy and became the short-lived AC Delco Systems.