Subaru Impreza WRX STI 206 revealed ahead of 2011 Tokyo Motor Show

Article by Christian Andrei, on November 25, 2011

This S206 version of the Impreza WRX STI is a product of the STI tuning division of Subaru. Japan fans are in luck since this model will be on display at the Tokyo Motor Show and is available in the country too. But it won’t be offered in the UK similar to the special STI-tuned S202, S203, S204 and R205 models that came previously. Subaru considers the S206 to be the “crown of its STI tune cars.”

The revisions to the S206 when compared to the standard WRX STI include additional power for its engine (which was exclusively built) and a group of sporty styling upgrades.

It also received a complete makeover for its suspension. The 2.0-litre four-cylinder boxer engine got an extra 20bhp over the standard WRX STI to reach 316bhp. Its torque was also raised by 18lb ft to 318lb ft. Other modifications include an improved twin-scroll turbocharger, STI-tuned ECU and sports muffler with lowered back pressure exhaust.

Subaru has yet to release the official performance figures of the car but it has announced that it has raised the accelerator response and its mid-range torque was also boosted to offer an improved driveability. The suspension revisions include an exclusive set of Bilstein front shock absorbers and STI coil springs.

It also has a flexible tower bar and draw stiffener at the front that provides a better straight-line performance. It keeps the car steady during cornering to enable it to make “precise and quick” adjustments mid-corner. It features new 19in BBS alloys with Michelin Pilot Super Sport tires. Aerodynamics is improved by putting in a new spoiler, grille and lower bumper. Meanwhile, the large fixed wing at the rear has been removed.

Its interior boasts of Recaro racing bucket seats and the use of Alcantara trim. In addition, Subaru offers a distinctive NBR Challenge Package edition of the S206. With this model, Subaru seeks to celebrate its class win at the Nürburgring 24 Hours. The vehicle has a carbonfibre roof and rear spoiler. Only 300 units of the S206 will be built but 100 of these are the NBR editions that have already sold out.

The Subaru Impreza WRX STI was already a highly optimized performance vehicle with specific chassis tuning and aluminum front lower L-arms that reduce unsprung weight. But the new 2011 model has major changes in chassis tuning, which includes a lower ride height as well as new pillow-ball bushings in the front and stiffer bushings in the rear subframe, supporting the double-wishbone suspension. All of these help improve camber and toe stiffness.

Both the front and rear suspension systems of the Subaru WRX STI use higher-rate springs as well as thicker front and rear stabilizer bars compared to the 2010 model (21 mm vs. 20 mm in the front and 19 mm vs. 18 mm in the rear). The spring rates increased by 15.6 percent in the front and 53 percent in the rear.

The 2012 Subaru Impreza WRX STI also has new standard 18-inch aluminum wheels that feature high-luster paint. They also weigh 17.6 lbs. less than the previous model’s standard wheels. The 2011 model’s optional 18 x 8.5-in. BBS forged aluminum-alloy wheels, which lessen unsprung car weight, are highlighted by silver high-luster paint.

The new car has a Brembo Performance Brake System, which is exclusive to the Subaru Impreza WRX STI. This brake system uses ventilated 4-wheel Super Sport anti-lock (ABS) disc brakes with Electronic Brake-force Distribution (EBD). The Super Sport ABS is able to control the braking forces independently at each rear wheel, thereby optimizing braking ability during hard cornering in order to lessen understeer.

Press Release

STI to introduce the SUBARU IMPREZA WRX STI

Subaru Tecnica International Inc. (STI)*1 is pleased to announce the launch of the SUBARU IMPREZA WRX STI "S206", special performance edition. The model will go on sale today through Subaru dealerships in Japan.

Based on the 4-door SUBARU IMPREZA WRX STI, S206 is the newest model in STI's "S" series. This series dons the crown of STI tuned cars with advanced driving performance and exclusively-made items in both interior and exterior designs. As with former STI models such as S204 and R205, S206 is founded on the IMPREZA WRX STI line.

In addition, "NBR CHALLENGE PACKAGE" model will be released to commemorate the class win*2 at 24 Hours Nürburgring endurance race held in June, with the addition of a carbon roof and original dry carbon rear spoiler. The exterior design incorporates racing car motifs and has an enhanced sporty feel.

Pre-orders for the "NBR CHALLENGE PACKAGE" have reached the limit for units available.

SUBARU IMPREZA WRX STI S206

S206's body and engine were tuned to perform as expected of STI's best model. The body employs exclusive Bilstein shock absorbers, STI coil springs, a flexible tower bar (front), and a flexible draw stiffener (front). While improving straight-driving performance, motion is steadied when going into corners so that precise and quick turning is possible. Plus, "Michelin Pilot Super Sport" tires provide refined driving comfort in combination with
"BBS" 19-inch aluminum wheels made only for this model.

In the exclusively-made engine, the weight balance between piston, connecting rod, and crankshaft is optimized to enhance the rev feel. Along with a ball bearing turbocharger, ECU (Engine Control Unit) with STI tuning, and a sports muffler with lowered back pressure exhaust - all of which were designed for this model - the engine can deliver 235kW (320PS) in maximum output and 431N.m (44kg.m) in maximum torque. The accelerator response is heightened and low to mid range torque increased, thereby offering better driveability.

On the outside, the lower front spoiler and front fender outlet grille, both designed for this model, and the trunk spoiler are among its distinctive features. The newly-made front grille and side garnishes were also employed for aerodynamics improvement and a high grade appearance.

In the interior are exclusively-made items such as a genuine leather-wrapped steering wheel, "RECARO" racing bucket seats, and seatbelts. Together they create a refined appearance and feel, appropriate for this flagship model.

*1: Subaru Tecnica International Inc. (STI; President Hiroyuki Karamatsu; located in Mitaka, Tokyo)
*2: Class SP3T

-Mechanism-
STI tuned Bilstein upside down strut and STI coil springs for front suspension
STI tuned Bilstein damper and STI coil springs for rear suspension
S206 BBS designed 19-inch x 8 1/2J forged aluminum wheels (silver)
Michelin Pilot Super Sports 245/35ZR19(93Y) tires
Brembo 6-pot silver colored brake caliper with STI logo and 18-inch 2piece type drilled disk rotors for front brake
Brembo 4-pot silver colored brake caliper with STI logo and 18-inch drilled disk rotors for rear brake
STI designed flexible front strut tower brace
STI designed flexible draw stiffener, front
STI designed flexible support, rear
STI designed support, front kit
STI designed lateral rink with pillow ball bush (front inside, rear inside)
S206 engine balanced with STI
STI designed S206 ECU (Engine Control Unit)
S206 twin scroll ball bearing turbocharger
STI designed S206 sport muffler with lowered back pressure exhaust
Large intercooler with S206 logo
STI designed strengthened silicon intake duct
STI designed air cleaner element
S206 multi mode VDC (Vehicle Dynamics Control)

-Interior-
S206 RECARO designed front bucket seat
S206 seat fabric, ALCANTARA® with black punching / red base, leather seat support (dark gray) with silver stitch
S206 door trim & centered arm rest (black ALCANTARA® with silver stitch)
S206 dark red colored seat belt
S206 silver side sill plate with S206 logo (front)
S206 leather lapped steering wheel with STI logo and silver stitch
STI designed leather shift knob with STI logo and leather shift boot
S206 leather side brake boot
STI designed push engine start switch (red with STI logo)
S206 serial number plate (console, engine compartment)

-Exterior-
S206 large front under spoiler
S206 front fender outlet grille
Aluminum front hood
STI designed trunk lip spoiler
S206 badges on front grille and rear gate
STI designed side garnish with STI logo (black metallic)
-Exclusive for NBR CHALLENGE PACKAGECarbon
roof
S206 dry carbon rear spoiler (2 angle adjustable with S206 logo)
BBS designed 19-inch x 8 1/2J cast aluminum wheels (black)
S206 Nürburgring Challenge sticker (rear)
S206 red side sill plate with S206 logo (front)

Maximum 300 units (must be pre-ordered by May 7, 2012)
[Including maximum 100 units of NBR CHALLENGE PACKAGE that must be pre-ordered by March 19, 2012]
Pre-orders for the "NBR CHALLENGE PACKAGE" have reached the limit for units available.
[Exterior color "Lightning Red" must be ordered by February 6, 2012]

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