Please Help...Strange Buzzing sound

[DirtTrash]

Having a little issue with a buzzing sound. I just installed new Weapon R headers, mid-pipe, and TRD exhaust. The sound didn't come about until I installed the header. It sounds like air getting between the manifold gasket and engine/header. But I may be wrong. That is why I'm asking you all. Remember that sound you used to make as a kid when you put a piece of grass between your thumbs and blow?? Thats the closest I can get to the sound. Is there anyone else here running a Weapon R header setup that can either agree/disagree with me on this??

[jnaval]

The way you put it makes it most likely a header exhaust leak.

[Luisfc1972]

^--- what he said