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WRX STI for 2018
A comprehensive handling enhancement for the 2018 STI includes the revised suspension tuning as featured on the WRX, plus a revised DCCD AWD system, significantly upgraded brakes and this model’s first-ever 19-inch wheels. The DCCD system, which previously used a combination of mechanical and electronic center limited slip differential control, now uses electronic control for quicker and smoother response. The 19-inch alloy wheels feature a striking Y-shaped spoke design and carry 245/35R19 tires that help raise cornering performance while giving the STI an even more aggressive stance.
 
The yellow-painted brake calipers identify a significantly upgraded Brembo Performance Brake System that now uses stronger monoblock 6-piston calipers in front, monoblock 2-piston calipers in the rear and larger, drilled rotors all around for better heat dissipation. New brake pads provide significantly greater surface area for improved braking feel and fade resistance. The STI also offers the Recaro seats (standard on STI Limited, optional for base trim).
 
Powered by a 305-hp 2.5-liter turbocharged BOXER engine, the WRX STI brings rally-bred performance technology to the road with Multi-Mode Driver Controlled Center Differential (DCCD) Symmetrical All-Wheel Drive. Standard handling technologies include Active Torque Vectoring and Multi-Mode Vehicle Dynamics Control.
 
Improved Usability with a Sporting Edge
The everyday usability that has contributed to WRX and STI popularity gets even better for 2018. All models feature upgraded interior materials, rear seat armrest with cup holders, redesigned interior door grips and faster remote trunk opening.
 
New measures that reduce unwanted noise include thicker door glass, revised door sealing and a foam-filled windshield header beam. A new, larger high-definition multi-function display (5.9-inch vs. 4.3-inch before) makes it easier to see vehicle functions at a glance. WRX Limited models feature power driver’s seat lumbar adjustment. The standard WRX adds heated exterior mirrors (already standard on others), while the WRX Premium upgrades to a SUBARU STARLINK™ 7.0” multimedia unit from the previous STARLINK 6.2” unit.
 
Safety

Subaru revised the front structure of the WRX and WRX STI for enhanced frontal collision performance. The WRX Limited, when equipped with EyeSight Driver Assist Technology now features Vehicle Hold (AVH), and a new EyeSight Assist Monitor (EAM). The EAM uses LED indicators to display EyeSight status and alerts on the windshield, allowing the driver to see them without diverting eyes from the road ahead. The AVH feature replaces the Hill Holder and Hill Start Assist functions and offers greater functionality, holding the vehicle on all road grades, not only inclines. For example, AVH can help reduce driver fatigue by holding the car at traffic lights, and then can seamlessly transition to acceleration.

WRX for 2018
With its 268-hp, 2.0-liter direct injection turbocharged BOXER engine, Symmetrical All Wheel Drive and Active Torque Vectoring, the rally-bred WRX is a performance and value benchmark in the high-performance AWD sport-compact segment. The WRX comes standard with a 6-speed manual transmission and offers an optional performance automatic transmission, the Sport Lineartronic® CVT with manual mode.
 
The WRX features new front and rear suspension tuning for improved steering stability and ride comfort, while retaining the car’s high cornering performance capability. Subaru significantly enhanced shifter feel for the 6-speed manual transmission, with a new synchro design and reduced friction, along with smoother clutch take-up. The WRX electric power steering (EPS) was revised to provide an even smoother, more natural feel, while integrating the steering motor and electronic control unit reduces weight.
 

A new optional Performance Package for the WRX Premium features Recaro 8-way power seats, red-painted brake calipers and upgraded JURID brake pads, and deletes the moonroof to reduce weight. The standard 18-inch wheels feature a bold new double-spoke design.

New York, N.Y., April 1, 2015 – Subaru of America, Inc. today unveiled the STI Performance Concept at the New York International Auto Show.

The STI Performance Concept signifies a plan for U.S.-expansion of Subaru Tecnica International (STI), the performance division of Subaru, in its three core business areas; aftermarket parts, STI-tuned cars and motorsports.

The expansion has already begun, with STI-engineered parts replacing Subaru Performance Tuning (SPT) aftermarket parts in the U.S. market, and with STI’s increasing engineering presence in Subaru of America’s Global RallyCross team. 

In the future, further models tuned by STI will be available in the US. These cars could feature more extensive modifications from the factory than previously offered, such as suspension, performance, braking, chassis and aerodynamic upgrades.

“At STI we know from our racing that to win, it is important not only to have high power, but also that all aspects of performance are balanced over the whole car,” said Yoshio Hirakawa, president of Subaru Tecnica International, Inc. “When we achieve this balance, the driver feels that the car is easy to handle and reliable, and he can use it fully to the limits of its performance. Our plan is to produce cars and accessories that drivers can really enjoy.”

The STI Performance Concept is a showcase for the engineering prowess and tuning capability of STI, featuring the racing engine developed by STI for the BRZ Super GT racecar, suspension and chassis components and aerodynamic upgrades.

Complete cars (extensive tuning by STI) and performance parts available now in Japan focus on the WRX STI, Forester and BRZ models. The Japanese domestic market uses the nomenclature “S model” as its naming for the WRX STI and uses “tS” on BRZ and Forester vehicles that have STI components, but a naming convention for any future US models has not yet been established.

STI was founded as Subaru parent company Fuji Heavy Industries’ motor sports division in 1988. In 1989, a first-generation Subaru Legacy, tuned by STI, broke the FIA-certified world speed record over 100,000 kilometers. From there, STI moved on to the World Rally Championship, winning 3 constructors championships and 3 driver championships for Colin McRae, Richard Burns and Petter Solberg. It currently competes in the Nurburgring 24 Hour Challenge race winning its class two times in 2011 and 2012 and also in the Super GT series with its BRZ-based Super GT.