music to be felt by the vehicle's occupants, analog gauges, stereo and climate control, or an optional digital gauge cluster, digital stereo with equalizer and an optional fully digital climate control system. Chassis The Z31 chassis was based on the 280ZX. Although the newer chassis had the same wheelbase and MacPherson strut/semi-trailing arm independent suspension, it handled and accelerated better than the 280ZX it replaced. Turbocharged models, except for the Shiro Special edition, had 3-way electronically adjustable shock absorbers. The Z31 was available in either left or right hand drive. Style and evolution The Z31 body was slightly restyled in 1986 with the addition of side skirts, flared fenders, and sixteen inch wheels (turbo models only). Many black plastic trim pieces were also painted to match the body color, and the hood scoop was removed. The car was given a final makeover in 1987 that included more aerodynamic bumpers, fog lamps within the front air dam, and 9004 bulb-based headlamps that replaced the outdated sealed beam headlights. The 300ZX-titled reflector in the rear was updated to a narrow set of tail lights running the entire width of the car and an LED third brake light on top of the rear hatch. This was the first car in history to have the central brake light with LED, in 1987 model year, made by Stanley Electric. The Z31 continued selling until 1989, more than any other Z-Car at the time. Cars produced from 1984 to 1985 are referred to as "Zenki" or "Zenki-gata" models, while cars produced from 1987 to 1989 are known as "Kouki" or "Kouki-gata" models. The 1986 models are unique due to sharing some major features from both. They are sometimes referred to as "Chuki" models, but are usually grouped with the Zenki models because of the head and tail lights. North American market North America was the main market for the 300ZX, as for previous generations of the Z-car. It was introduced to the United States in October 1983, along with the remainder of Nissan's 1984 model year lineup. By now the "Datsun" nameplate had been completely retired in North America. Over 70,000 units were sold in North America in 1985 alone. There were three trim models available: SF, GL, and GLL. The SF model was only available in Canada. The new V6 (2960 cc) Single overhead cam engine was available as a naturally aspirated VG30E or a