turbocharged VG30ET producing and respectively. The 1984 to 1987 turbo models featured a Garrett T3 turbocharger with a 7.8:1 compression ratio, whereas 1988 to 1989 models featured a low inertia T25 turbocharger with an increased 8.3:1 compression ratio and slightly more power — naturally aspirated and turbocharged. For the 1986 model year, the base two-seater model was made available without the T-bars, creating a lower cost entry-level version. Special editions Two Special Edition versions of the Z31 generation model were produced by Nissan; a 50th Anniversary Edition celebrated the company's semi-centennial in 1984 and offered additional luxury features, and a "Shiro Special", released four years later, with performance-oriented upgrades. The 1984 300ZX 50th Anniversary Edition, released to celebrate the automaker's half-century, was a turbocharged coupé (two-seater) model with a Silver/Black color scheme. All 50th Anniversary Editions came equipped with a digital dash and ancillary gauges including average mileage, G-force, and compass readouts, in-car electronic adjustable shocks, Bodysonic speakers in the seats, cruise and radio controls in the steering wheel, mirrored t-tops, embroidered leather seats, embroidered floor mats, sixteen-inch (406 mm) aluminum wheels, rear fender flares, flared front fenders, a 50th AE logo badge on the driver's side front fender, and grey cloth indoor car cover with 50AE printing. The only option available to the 50th Anniversary Edition was the choice between an automatic or a 5-speed manual transmission. 5,148 AE models were produced for the U.S. market and 300 for the Canadian market. A non-turbo 2+2 model was also available with 50AE badging in the Australian market. 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 speeds, as tested by Motor Trend with the electronic speed limiter disabled. A total of 1,002 Shiro Special Z31s were produced for the U.S. market between January and March 1988. Japanese market In Japan, the Z31 was marketed as the Fairlady Z and was originally only available with two turbocharged engines: the VG20ET in the regular Fairlady Z and the VG30ET in the Fairlady Z 300ZX. Both outputs are JIS Gross and both engines use the Garrett AiResearch T03 turbocharger. The 300ZX,