I'm sure you guys have seen a video like this before but I figured I'd put on up just to help anyone thinking about getting Berk HFC's. I bought mine used with 2500 miles on them, so if there is any difference in NIB and used sound, mine is the latter.

I think they sound great. They aren't super loud, but I can definitely tell they're there. Also, with the Stillen Gen3, they add a really nice note. Before the install, ALL the growl came from the intake and now it's spread through more of the entire car.

Enjoy

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sound sweeeeeett!!