Subaru announced on 3 September 2018 that it will set a new grade “STI Sport” on the sports sedan “WRX S4” and it was released on September 21 the same year for the Japanese market.

WRX S4 STI Sport is a new top grade model of WRX S4. “In collaboration with Subaru’s motorsports headquarters STI, we have achieved a performance that combines supple riding comfort with agile handling and high handling stability as well as a special interior and exterior design unique to STI Sport I adopted it and pulled out the potential possessed by WRX S4 to the utmost. ”

Main special equipment is as follows.

Subaru WRX S4 STI Suspension / Mechanism

STI tuning Bilstein damper & coil spring

The engine is the same as in the regular WRX S4: 2.0-liter four-cylinder Boxer Engine unit rated at 300 PS (296 hp) and 400 Nm (295 lb-ft) of torque, mated to a Sport Lineartronic CVT automatic and Subaru’s AWD system.
245 / 40R18 tire, 18-inches × 8 1/2 J aluminum wheel (dark gray metallic paint)
STI Tuning Bilstein Damper & Coil Spring (Front: Dampmatic II, Inverted Type)
Electric power steering with high rigidity clamp stiffener (left and right)

Subaru WRX S4 STI Exterior Design

WRX S4 STI Sport front grill (dark metal paint)
Side garnish with STI emblem (black colored)
STI emblem (front & rear)
Black colored door mirror
Trance clip spoiler (black colored)
Shark fin antenna (black colored)

Subaru WRX S4 STI Interior Design

Genuine leather-wrapped steering wheel (red stitch + high tactile leather + high-gloss black bezel with STI logo)
Genuine leather-wrapped shift lever (red stitch + high tactile leather + high gloss black decorative panel)
RECARO front seat (black × Bordeaux, red stitch + STI logo included)
STI logo stainless steel side sill plate (front)
Felt wrapped front & rear large door pocket (with bottle holder)

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The price is 4,093,200 yen (roughly $38,850), the body color is a lineup of all six colors of ice silver metallic, crystal white pearl, dark gray metallic, crystal black silica, pure red, WR blue pearl.