winter comes problems starts!

Last week I installed a brand new HKS SQV got bored in a few days and sold it. I reinstalled the stock bypass valve and now a weird noise coming from it. It sounds like wrc car wastegate flutter. I like the way it sounds but I'm also wondering about it? I wish I could record it. Any idea? what may cause this?

 

Have you got the standard air box in place or induction kit?

 

God damn! Workman put the bypass in wrong direction! I cant belive it, and now the rocker seals started to leak a bit.