 2000.12 : Subaru announced the release of the new-age GDB Impreza WRX STi
(type A).
The Subaru Impreza WRX STi series has been developed to contest in the
World Rally Championship (WRC).
The Impreza WRX STi series features improved driving performance while
maintaining its ease of daily use by featuring a newly developed highly
rigid 6 speed manual transmission, a new designed EJ20 Horizontally-Opposed
2.0liter AVCS turbocharged engine, a large intercooler, and strut suspension
with inverted type dampers.
The EJ20 Horizontally-Opposed 2.0liter AVCS turbocharged engine makes 280
horsepower at 6400rpm and 38.0kg-m of torque. To increase the engine reliability,
the semi-closed deck type cylinder block is adopted. The engine performance
has been improved by adopting the lightweight shimless valve lifters and
AVCS (variable valve timing system), by improving the turbocharger, by
improving the cooling capability, and by adopting the enlarged intercooler
and air-intake.
The Impreza WRX STi uses the all wheel system with center diff, Viscous LSD, and Suretrac LSD. The Impreza WRX type RA (16in) is equipped the driver's controll center differential swich (DCCD), and adopts a mecanical rear LSD and a Suretrac front LSD.
The suspension has been updated to improve stability and control geometry changes in hard cornering. And the Impreza WRX STi adopts Brembo brake system, Supersports ABS with G sensor and EBD, and inverted type dampers.
2001.09 : The Impreza WRX STi got a mild face-lift (type B). And The Impreza
WRX STi "Prodrive Style"was added to the Impreza WRX STi line-up.
It comes with exclusive front bumper & front grill, and side &
rear spoiler that designed by Prodrive.
2001.12 : The Impreza WRX STi type RA Spec C was added. And it achieves
the max torque of 39.2kg by improving the turbocharger and cylinder exhaust
efficiency. Compared to the Impreza WRX STi type RA, Impreza WRX STi spec
C is about 90kg lighter through the adaptation of lighter glass, and thinner
roof construction and a trunk lid. A rear crossbar has been fitted to further
improve body rigidity. The turbocharger in the Impreza WRX STi spec C uses
precise ball bearings in the shaft to reduce friction, thereby offering
a smooth and speedy turbo boost and providing ideal engine response. Large
water reservoir for the intercooler water spray as well as an air-cooled
engine oil cooler have been implemented to ensure stable engine performance.
2002.06 : The Impreza S202 STi version (400 limited production) and the Impreza WRX STi limited were introduced.
The S202 STi version, based on the WRX STi Spec C 17-in model, is powered by the tuned EJ20 engine that makes 320 horsepower. The Impreza S202 STi versions is equipped with a higher power ECU, a air-intake for competition, an air duct hose, a engine oil cooler, a titanium muffler, rotors with slit, sten-mesh hoses, PIRELLI P-ZERO tires, RAYS wheels, a STi carbon rear spoiler, a exclusive gauge cluster, power window, center door lock, and manual air conditioner.
The Impreza WRX STi limited, based on the Impreza WRX STi, features the Spec C engine (but not ball bearing turbo) that makes 39.2 kg of torque.
2002.11 : The Impreza WRX STi (type C) got major upgrades including new
front exterior design and feeling of quality improvement of interior design.
The engine makes even more power, it makes torque of 40.2kg-m. Intercooler
efficiency has been boosted with enlargement of the intercooler air intake.
And the Impreza WRX STI adopts the twin scroll turbo, equal-length 4-2
exhaust manifold, and aluminum pistons. Furthermore, the engine reliability
have been enhanced by improving the durability of a cylinder block, connecting
rod, and crank shaft.
2003.04 : The Impreza WRX STi Spec C Limited was introduced. The Spec C
limited is equipped with power window, center door locks, electric powered
door mirrors, manual air conditioner, exclusive seats cloth, off black
center panel & venti rater grille, black door trim, leather wrapped
shift brake lever & plating button, red meter, REV indicator, and sports
pedals with aluminum pads.
2003. 9 : There were some changes (type D)
2003.12 : 2003 V-Limited was introduced. The WRX STi 2003 V-limited is equipped with exclusive suspenison(tuned by Arai), STI front under-skirt, STi aluminium shift knob, roof ventirater, and SWRT stickers.
2004.06 : There were some changes including the adopting the yaw-rate censer
to the DCCD. (type E)
2004.07 : The limited edition Impreza WR-Limited 2004 was added to the Impreza WRX and the WRX STi Spec C. The WRX WR-Limited features, based on the WRX, including front corner spoilers, the STi front under skirt, a large size rear spoiler, RAYS 17 inches alloy wheel, HID low beam headlights, exlusive front bucket seats in blue color, sports pedals with aluminum pads, exclusive shift knob, and exclusive stickers.
WRX STI Spec C WR-Limited is equipped with the full auto air conditioner, exclusive bucket seats, sports pedals with alumium pads, center door lock, power windows, and electric fold-in colored door mirrors.
2004.10 : The Impreza WRX STi Spec C type RA is added to the Impreza WRX
STI line-up. The WRX Spec C type RA features including front coner spoilers,
the STi front under skirt, 17x8.0 STi alloy wheel wheels, STI sports suspension,
full auto air conditoner, center door locks, power window, and sports pedals
with aluminum pads.
 2004. 12 : The Impreza S203 was introduced. The turned EJ20 engine adopts the large sized boll bearing turbo, exclusive ECU, adjusted pistons and con-rods of the balance, sports catalyzer, and the engine oil cooler.
2004.12 : The Impreza WRX 2004 V-limted features including the STi front under skirt and STi side skirt, a large size rear spoiler, RAYS 17in alloy wheels, HID low beams, exclusive bucket seats with SWRT stitching, and SWRT stickers.
 2005.06 : The Impreza WRX STi (type F) got major upgrades including a newly
designed front bumper, grille, headlights, and rear combination lamps.
The exclusive 2.0liter BOXER engine has been improved,and it makes a maximum
engine torque of 422Nm (43.0kg/m). The 6 speed manual transmission employs
carbon-synchronized gears for 4~6 speed. And its electronically controlled
AWD system DCCD has been improved by adding the torque-sensitive mechanical
LSD. The Impreza WRX STi adopts the front corner spoiler, side grille, a 260km/h
speed meter, a roof vane (spoiler), and under diffusers. The Impreza Spec C
adopts a large sized rear spoiler, black color interior design, a 260km/h speed
meter, immobilizer, aluminum sports pedals, full auto air conditioner (17in
version), roof ,and under diffusers.
2005. 08 : The Impreza WRX STi spec C type RA 2005 (350 units) was introduced.
The Impreza WRX Spec C type RA 2005 features including STi front under
skirt, 17 inches alloy wheels, a stainless muffler, and exclusive sports
suspension.
2005. 12 : The Impreza S204 was introduced (600 units) The EJ20 engine has been
improved by having the exclusive large sized boll bearing twin scroll turbo, the
exclusive ECU, the exclusive sports catalyzer, and the titanium muffler.
Moreover, the EJ20 engine has achieved a smooth engine rotation rise by the
weight equalization of pistons and con-rods, and by the balanced crankshaft by
the hand-work. And it equipped with performance dampers jointly developed by
YAMAHA and STi, and exclusive strut, BBS 18in x 8.5 alloy wheels, outer
ventilated type brake rotors, Recaro seats, and the rear wing.
2005.12 : The Impreza WRX STi Spec C V-limited 2005, based on the WRX STi Spec C
17in version, features 17 inches white color alloy wheels, a jyurakon STi shift
knob, front bucket seats, a STi front under skirt, and a aluminum shift
boot ring.
2006.06 : The Impreza WRX STi A-Line is added to the Impreza WRX STI
line-up. The Impreza WRX STi A-Line features including SRS side airbags, the
STi front under skirt, front foglamps, the rear lip spoiler, center piller
covers, exclusive alcantara/leather bucket seats with STi embroidery, dark
metallic center panel, alloy wheels, and Brembo black color calipers.
2006.11 : Subaru announced the release of the Impreza WRX STi Spec C type
RA-R, based on the Impreza WRX STI Spec C, in Japan on November 8. The Impreza
WRX STi Spec C type RA-R comes equipped with a specially tuned EJ20 engine
matched to a 6 speed manual transmission. The EJ20 engine makes 320 horsepower
(235kw/6400rpm, 432Nm/4400rpm) by having large size tuned turbines, exclusive
ECU, a exclusive catalizer and a stainless muffler. The Impreza STi Spec C type
RA-R has adopted Brembo 6 pods front brake calipers,exclusive grooved rotors,
exclusive stabilizers and exclusive suspension to achieve the high driving
performance.
Furthermore, the Impreza WRX STi Spec C type RA-R is equipped with
exclusive 18x8.5 alloy wheels, Potenza RE070 235/40R18 tires,a red hazard
switch, a dark metallic center console, a front under skirt, a exclusive design
front grille center, and a RA-R emblem.
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