Exhaust like a bird

When I was looking for some bosozoku style videos I came across an exhaust builder who creates exhausts for vans and places videos of the exhausts he built on Youtube. This video is one of those exhausts:

At first I thought it was only this video in which it sounded as a bird, but I tormented myself and watched (and heard) every single one of them and I can tell you all of them sound the same! 😀

I really think it is a piece of art and a big achievement to create such exhausts, but I’m pretty sure I would never want an exhaust on my car which sounds like a bird!