When another batch of spy photos of the upcoming Subaru Exiga surfaced yesterday, we didn't give it much thought. We pretty much know the styling direction and dimensions of Subaru's new people mover, but one portion of AutoExpress' article caught our attention. In addition to the Exiga joining a new Legacy sedan and Outback wagon in 2009, Subaru's future drivetrain plans include dropping the 3.0-liter boxer and reworking the 2.0- and 2.5-liter engines to increase efficiency and power. The naturally aspirated 2.0-liter will supposedly produce 200 hp, while the current turbocharged 2.5-liter will exceed 300 hp. While neither of which is huge news, AE also mentions that a Legacy STI is on the way with a turbo'd 3.7-liter producing close to 450 hp. Whether or not such a beast will actually come about is open to debate, but when it does, we hope that Subaru has the foresight to make it available in the U.S.