Did Pontiac install the ws6 package or was this performed by an outside source?

The WS6 package was an official performance option offered by Pontiac for certain models, particularly the Firebird Trans Am, during the 1970s and 2000s. It included enhancements such as improved suspension, upgraded brakes, and more powerful engines. Therefore, the installation of the WS6 package was performed by Pontiac at the factory, rather than by an outside source.