and 87-89 production having the same spoiler as the USDM 1988 Shiro Special model. Swedish- and Swiss-market models (as well as those sold in Australia) received exhaust gas recirculation control systems to meet those countries particular emissions regulations. Australian models All Australian model Z31 300ZXs were 2+2 T-top body, with an engine offering of either the 3.0L V6 N/A VG30E, or the 3.0L V6 Turbo Charged VG30ET. The cars sold in 1984 and '85 were all naturally aspirated with no catalytic converter, while the turbocharged version was the only model available from 1986 to 1988. There was only one trim level in Australia, with the digital dashboard and climate control being an optional upgrade package, and leather seats only available in the redesigned series 3 "Californian" models. The Australian factory service manual provides camshaft measurements which do not match any of the known USDM or EDM camshaft profiles, the FSM states the exhaust valve has an open duration of 252 degrees, but the specified opening and closing angles add up to 258 degrees. All Australian publication content express that N/A versions possess , along with the turbocharged versions as . The Australian 50th Anniversary Edition was more basic than the U.S. version, the 50th AE was a normal n/a 300ZX with the digital dash package, a black interior, black velour seats, and a 50th AE badge on the exterior. The exterior badge was fixed to the cars by dealerships, so the position of the badge is not the same on all models. There was no Shiro Special in Australia, and no models featured the adjustable shock absorbers. Z32 The Z32 was a new design, approved in final form by Nissan management on October 1, 1986 and designed by Isao Sono and Toshio Yamashita. The body was wider with a rounder profile and fewer hard edges. It had a marginally increased drag coefficient of .31 compared to the Z31's .30. Unchanged from the previous generation 300ZX was the displacement of the VG30 V6 engine, now with DOHC and variable valve timing (N-VCT), producing at 6,400 rpm and at 4,800 rpm in naturally aspirated (NA) form. The twin turbocharged (TT) variant was upgraded with Garrett AiResearch parallel twin-turbochargers and dual intercoolers producing at 6,400 rpm and of torque at 3,600 rpm. The Z32 was the first car to be marketed following the introduction of the power ceiling imposed by JAMA that remained