1985 Tokyo Motor Show. The white car with burgundy interior is the first car to be called Celica GT-Four with the theme "open air 4WD motoring". The convertible never went into production, but the concept went to the liftback model which began production in October 1986. The ST165 GT-Four can be distinguished from the front-wheel-drive Celica by its front bumper, which has larger openings and round fog lights on each side, and the "GT-Four" decals on the doors. Inside, the original GT-Four has a differential lock switch near the hand brake for the pre-facelift model built from October 1986 to September 1987. The Celica GT-Four was updated in October 1987. As with other front-drive Celicas, the ST165 received a new grille, tail lights, and alloys. The export version also has ground effects, noticeably the side spoilers and standard dual front round fog lights. The center differential was changed from a manually lockable unit (either open or locked) to a viscous-coupling limited-slip type. The GT-Four was marketed in the US as the All-Trac Turbo and in Canada as the Turbo 4WD. The ST165 was not sold in North America before 1988 except for seventy-seven special-edition cars sold to commemorate Toyota's IMSA GTO championship win. These Celicas are all white with white wheels and blue interiors and have "IMSA GTO Champion" printed in small letters on the side moulding, as well as white stripes on the grills. One car was sold at each of the 77 Toyota dealerships in California. They were sold in 1987 as 1988 models, and have viscous-coupling center differentials. When the Celica GT-Four was launched in the United Kingdom in 1988 it was the first car sold in the United Kingdom designed to run only on unleaded gasoline. The ST165 was the only car to be sold with the first version of Toyota's 3S-GTE. It developed 182–190 hp (depending on the market and model year) and of torque. ST185 (1989–1993) The first 21 units of the Celica ST185 were built in December 1988 as prototypes for various tests. The production model was launched in Japan in September 1989, and delivery began a month later. The 3S-GTE in the ST185 GT-Four features an air-to-air intercooler and CT26 twin entry turbo to eliminate exhaust gas interference. The Japanese market GT-Four has of power and of torque, a result of more aggressive ignition advance and ceramic turbine. The Full-time 4WD system