of Subaru's six cylinder engines are a Flat-6 Four-stroke cycle design, Liquid Cooled. ER ( Japanese : Subaru ER27 ) Subaru  introduced its first six cylinder engine in  its Subaru  XT sports car. This SOHC engine was based on the EA82,  with two cylinders added to the back. ER27: 2672cc SOHC , 145 hp@5200 found