The Subaru Performance-B STI Concept takes center stage at the 2025 Japan Mobility Show, rekindling excitement among fans longing for a true STI model. Featuring a turbocharged boxer engine and all-wheel-drive setup, this concept suggests that Subaru’s performance DNA is far from forgotten.
A Hatchback Revival
The Performance-B STI Concept reintroduces the hatchback silhouette that many enthusiasts have missed since the WRX hatchback’s discontinuation. With a low, wide stance and sculpted bodywork, it combines functionality with unmistakable STI aggression. Its large air intakes, extended fenders, and striking aerodynamic features convey pure rally-inspired energy.
Design that Balances Style and Purpose
Unlike the more futuristic Performance-E STI Concept, the Performance-B feels closer to production. It carries practical yet performance-focused elements such as new splitters, side skirts, a hood scoop, and signature red STI detailing. The oversized rear wing dominates the design, perhaps exaggerated, but unmistakably bold. Subaru even pays homage to its heritage with the “Proud of Boxer” slogan etched into the hood scoop.
Interior and Details
Inside, the concept closely mirrors the current WRX cabin layout, including the familiar six-speed manual transmission and large central touchscreen. Subtle STI touches, like unique badging and trim accents, differentiate it from the standard WRX. The result is a driver-focused interior that remains authentic to Subaru’s performance roots.
Performance and Powertrain
Subaru has yet to confirm exact specifications for the concept’s engine. However, the automaker revealed that the Performance-B STI uses a horizontally opposed combustion engine, hinting strongly at an evolved version of the WRX’s 2.4-liter turbocharged four-cylinder boxer. This setup, combined with Subaru’s symmetrical all-wheel-drive system, promises both agility and grip, core traits of the STI lineage.
Symbol of Subaru’s Performance Heritage
While the Performance-B STI Concept remains officially a prototype, its near-production appearance and mechanical hints make it one of Subaru’s most exciting show cars in years. It celebrates the brand’s rally-bred engineering philosophy and suggests that a gasoline-powered STI might still have a place in Subaru’s future lineup.
Summary
The Subaru Performance-B STI Concept channels the brand’s racing spirit through a modern hatchback form. With its turbo boxer powertrain, aggressive stance, and signature all-wheel drive, it captures the essence of Subaru’s performance heritage. Whether it leads to a production model or not, this concept proves that the STI name still stands for passion, precision, and driving excitement.
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Source: Subaru
