What turbo is everyone who is having this problem running? TD04?
After I installed a Cobb Catted Downpipe I had a tiny exhaust leak that drove me crazy. When I upgraded to a VF39 I found the source of the leak; the downpipe and TD04 don't line up exactly and there is a small point on the bottom right corner where the gasket doesn't get properly sandwiched and you end up with a tiny exhaust leak. Everything lined up perfectly on the VF39 and no more exhaust leak!