Originally Posted by Max Capacity
I would think that if you have a leak at the up pipe, you would clearly hear that.
Have you removed the mufflers and taken the car for a ride ?
IMO that's easier then messing with the up pipe gasket.
Byron, it sounds like its coming from the turbo area. It very well could be an up pipe gasket, or the header gaskets.
I have not tried to remove the mufflers