both, but the one that makes a difference in sound is when i push down on the manifold. I'm probably going to take the intake manifold back off, when I get the new J pipe ready to install, after I get the rest of the pieces.
I sprayed carb cleaner near the back runner where I thought, and no stumble, or better run, etc.. possibly on the bottom or something I'll have to pull the turbo off to find out. I ran out of time to play with it today though... Someone suggested doing the soapy water thing to me, it didn't show me anything.