Here are some of the most common part numbers you will need for maintaining your Celica All Trac.  There are also some part numbers of GT-four parts that you can swap into your All Trac for performance.  If you have more part numbers to submit please E-mail me.

ST165

Turbo Intake
AirFlow Meter to 1st Metal Peice	17659-88381
Metal Piece to Turbo	17882-74160
Intercooler
Turbo to Intercooler Hose	17659-88381
Intercooler to Throttle Body Connector	17861-88382
Coolant Level Sensor	89256-22010

ST185

Turbo
Turbo Gasket Kit	04175-74030
Exhaust Manifold Gaskets	(90-92) 17173-88381 & (93+) 17173-88382
Radiator
New Radiator	23300-74560
Radiator Fan Switch	89428-33010 ($78.95)
Radiator Relay	85925-17010 ($34.52)
Engine
Distributor O-ring	90099-14090
Distributor cap O-ring	19127-74040
Idle Speed Controller Gasket	22215-74380 ($3)
Idle Speed Controller Valve	22270-74080 ($148.50)
ISC Screws	21821-25180 ($.89 x 4)
Radiator Fan Switch	89428-33010 ($78.95)
Radiator Relay	85925-17010 ($34.52)
Misc
Hatch Bump Stops	90541-09047 ($2.26ea)
ST185RC/CS Parts	CLICK HERE

ST205

Intercooler
Standard ST205	17940-74080
WRC (GroupA) Version	17940-74100

Cross Reference

Those parts which can be swapped between models.