The Toyota Celica GT-Four (ST165) is a high performance model of the Celica Liftback that was produced from 1986 to 1989, with a turbocharged 3S-GTE engine, and full-time AWD. It was created to compete in the World Rally Championship, whose regulations dictate that a manufacturer must build road-going versions of the vehicle in sufficient numbers. These vehicles are referred to as "homologation special vehicles".
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 1986 and 1987 model years.
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 All-Trac Turbo and in Canada as 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 interior and have "IMSA GTO CHAMPION" printed in small letters on the side moulding, as well as a white stripe on the grill. One car was sold at each of the 77 Toyota dealerships in California. They were sold in 1987 as 1988 models, and do have the viscous-coupling center differential.
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 & model year) and 249 N⋅m (184 lb⋅ft) of torque.
(Description text from Wikipedia, licensed under CC BY-SA 3.0)
