The Chevrolet Corvair (1960-1969) beat the 911 to market with a rear-mounted flat-six, but Chevy's engineering gamble came with a steering behavior that made it genuinely dangerous in untrained hands. While Porsche refined the concept into something manageable, the Corvair became a cautionary tale about how good ideas can get weaponized by poor execution.

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.

The flat-six that powered the SVX is getting a second life as a race engine in 2026, proving Subaru's willing to dig through its own history when it matters. The EG33 hasn't seen competition since 1996, but someone in Subaru's motorsport division apparently decided that heritage boxer engineering still has something to say on a racing circuit.