WS6 is a RPO code that you can find under the lid of your center console. It was a brake and handling package that wasn't an option on 3rd gens until 87. It consisted of 4-wheel disc brakes, bigger anti-sway bars, 16X8 wheels,stiffer springs and revalved shocks and struts. You could get the WS6 package on Formulas, T/As, and the GTA. In 91 they had a package that was even better, for stock sport car racing, called the 1LE option.