That Subaru Rumble? Here's why that happens

There's no doubt that you've heard the distinctive noise that is a Subaru in the distance. It's a rumble and you know what it means. A 2.5-liter "boxer" flat-4 engine is heading your way, and it's eager to spit noise into your ear holes. Why does it sound so different than any other engine on the road? That's a question best answered by our friend... That Subaru Rumble? Here's why that happens