Like I've said before, I no longer have the problem anymore. Once I swapped out the turbo manifold (header) and had my exhaust redone, the vibration went away. I'm pretty sure it has to do with the turbo manifold, it might have been slightly warped. Right now I am running a custom cast iron log manifold, and haven't had a single problem with it (no cracks, vibration etc.) and the flow is fine. I would recommend getting a cast iron manifold, those things will never crack, they may look ugly and may not look as cool as those ram style stainless steel ones, but I've had nothing but bad luck with those. My friend just bought a Blox ram style manifold and has only had it for a few days and it already has a crack. Not saying all those are all bad, but it seems like the cast iron manifolds are a little more reliable. Anyway, my recommendation to you is you should definitely get a flex pipe first of all, and get a whole new turbo manifold. Also, do some more research, find out what manifolds are good quality and such....I heard you can give your manifold a ceramic coating, that would also definitely help out. Another thing you can do, is get some custom built supports built for your manifold that bolt up to your engine block and reach up to your manifold and get them welded to it, for extra support. Hope this helps.....