[nick]

Its quiet dont get me wrong but between 3-4k is is really buzzy! I am running a race header, but its just sounds nasty when getting on it.

 

[Gandalf]

I never heard that exaust sound buzzy. Is everything tight(all the bolts)??

 

[focusownerskid]

Sounds like you have a leak of some sort man.

 

[FSWerksVP]

Yeah, something is up, it's not buzzy when properly installed. Give it a look if you can. Give us a call if you still can't fix the noise. Good luck.