By now, you've heard plenty from the Mustang Shelby GT350R, the even-more-hardcore version of Ford's most track-tuned Mustang ever. We had not one, but two videos of the GT350R revving just last week.

But this is 2015. Noise regulations, customer expectations, and just plain politeness all prevent Ford from selling a car that wails as loudly at all times as the videos we've seen so far. Plus, we already knew that the GT350 and GT350R would have selectable driver modes. A quieter driving mode was all but assumed.

Now, we've got video from YouTuber and Focus ST forum-goer TwoPupsInTheTub to back up that assumption. Here's how the 526-hp GT350R's flat-plane-crank 5.2-liter V8 sounds in each of its exhaust modes.

In its quieter settings, it sounds subdued but angry. Fully uncorked? Your ears will bleed with joy.

This content is imported from YouTube. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

Thanks to Frankie for the tip!

This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io