Yes at the ASC facility in Livonia Michigan and made in Japan
Yes it was put over a Firebird center cap .....but the caps were not finished as the Firebird emblem was molded in the cap but did not go through the painting process on the emblem to save money. Then the GNX logo was added. I actually installed several dozen GNX appliques to the caps myself at the assembly plant as were received the caps and added the applique.