The 2015 Subaru WRX has a flat 4 engine.
The 2010 Subaru Forester has a 2.5 L base engine size.
The 2013 Subaru Tribeca has a 3.6 L base engine size.
The 2009 Subaru Impreza has a 2.5 L base engine size.
The 2013 Subaru Legacy has a 2.5 L base engine size.
The 2004 Subaru Impreza has a 2.5 L base engine size.
The 2011 Subaru Forester has a 2.5 L base engine size.
The 2012 Subaru Impreza has a 2.0 L base engine size.
The 2014 Subaru Outback has a 2.5 L base engine size.
The 2009 Subaru Forester has a 2.5 L base engine size.
The 2012 Subaru Outback has a 2.5 L base engine size.
The 2001 Subaru Legacy has a 2.5 L base engine size.