Subaru STI Performance-B Concept: The Gas-Powered Legend Could Return

Subaru surprises fans with a stunning STI concept that looks ready for production.

A STI Concept That Turns Heads

At the 2025 Japan Mobility Show, Subaru unveiled not one but two STI concepts. Among them, the Performance-B STI immediately caught attention. With a massive rear wing, custom wheels, STI-specific styling, and a hood scoop, this concept appears shockingly close to a production-ready car. Based on the second-generation WRX sold in the US, the five-door design adds practicality to the classic performance sedan formula.

Performance Under the Hood

While Subaru has not officially confirmed the engine, the Performance-B STI uses a horizontally opposed combustion engine, likely a turbocharged 2.4-liter boxer. Fans of manual transmissions will be pleased: the concept keeps a six-speed manual gearbox and the interior remains largely similar to the WRX, with a few STI badges and a large central touchscreen to emphasize its sporty identity.

Design and Technology Highlights

The front and rear splitters, side skirts, and bold red accents reinforce its aggressive appearance, signaling Subaru’s commitment to performance heritage. Unlike the fully electric Performance-E STI concept, the Performance-B seems aimed squarely at traditional driving enthusiasts, offering a combination of classic STI styling, technology, and practicality.

A Potential Comeback for Gas-Powered STI

Given Subaru’s previous statements that a new gas-powered STI was unlikely, the Performance-B concept may signal a change. With WRX sales slowing and a strong fan base longing for a true driver’s car, this concept could reignite interest in Subaru’s iconic performance line, especially in the US market.

Why Fans Are Excited

The Performance-B STI represents everything enthusiasts love about Subaru: boxer engine dynamics, sporty styling, and manual transmission engagement, combined with subtle modern upgrades. If production follows closely behind this concept, the STI name could return stronger than ever, blending heritage with contemporary performance demands.