After 28 years of the EJ20 flat-four running Super GT, Subaru's swapping in a new boxer six for the 2026 BRZ GT300. The move signals a serious commitment to staying competitive in Japan's premier racing series, though details on displacement and output are still locked down. This is the first major powertrain shift for Subaru's GT300 program since 1998.

The 2026 BRZ GT300 gets a 3.0L twin-turbo boxer engine, ditching the EJ20 for an EG33-based block that hasn't seen production in three decades. Subaru's finally admitting that naturally aspirated 228 hp wasn't cutting it anymore—and the motorsport connection suggests this isn't just marketing theater.

Subaru ditched the EJ20 for a purpose-built twin-turbo six in their GT300 challenger, chasing a first title since 2021. The move signals real hardware commitment, but in a category where Japanese manufacturer dominance is collapsing, timing matters. New engine, same uphill fight.