Hks bov doesn't sound right on Evo X
 

Hi, first, thanks for looking at this post.
I recently installed Hks bov on my Evo X, but the sound just doesn't sound right. Can anyone help? Is it normal or harmful? And how to fix it? I did lots of research, bit there is not a reliable way to fix it. I just want to make the sound to sound normal and sharp.
Here is the video: http://youtu.be/vyVnELjs7h4
Thanks for the help! Really appreciate!

Free-reving won't sound the same as when you're under load. Letting off at 6000+ rpm and ~20 psi will sound a lot different.

I don't hear anything "wrong" in your video - but if you don't think the response is as fast as it should be, make the vac/boost reference line as short as possible. And if you're using those in-line air filters on the reference line, make sure they are new and/or clean.

sounds normal

Thank you so much for you help. Really appreciate!

That's what I want to hear, thank you!

bro, sounds normal to me, I had the same one on my IX and it sound different when the car is in motion