In 1988, the turbocharged Shiro Special debuted with pearl white paint, stiffer springs and matched shocks, heavy-duty anti-sway bars, a unique front air dam, paint matched wheels, Recaro seats with matching door panels, painted bumperettes, white painted door handles and a viscous limited-slip differential. No options were available for the Shiro. It was the fastest car out of Japan, capable of 153 mph (246 km/h) speeds, as tested by Motor Trend with the electronic speed limiter disabled.[5] A total of 1,002 Shiro Special Z31s were produced for the U.S. market between January and March 1988.[6]