I think it's pretty quiet for .007 piston wall clearance. It was louder stock than now. Not to mention the new manifold has zero cracks compared to the old one. It sounds like you can hear a leak ever once in a while but I'm not sure. I need to check the crossover pipe.
Tahoe start up from cold. - YouTube

 

When you start it up cold feel around the the exhaust for a leak. When it is cold, it wont burn you, but you can feel it.

 

I know it. I've just been focused on other things and haven't worried about it. It sounds way better than it use to. I wish I would have made a video. It was bad the manifold was work hardened so bad it was unfixable. It got to where I could weld it up and after one heat cycle it would crack. I even welded it with the turbo mounted and that didn't work.

I think it's just the cross over pipe to the turbo manifold. I couldn't find my 15mm deep well when I bolted it all up and the wrench just didn't seem to get it as tight as I wanted.