Turn up the earbuds and enjoy the amazing sounds from these Porsches.

In a new video, Porsche opens the doors to its archives and shows off the five loudest vehicles in the brand's history. The result is an earful of engineering perfection.

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As a slight spoiler, there's not a single road-going Porsche model on this list. Instead, the top five highlights some the brand's coolest race cars of the past. They're not all 911s either, although the venerable model makes several appearances here. 

Source: Porsche via YouTube