anyone had any problems with exhaust leak at the back of the manifolds where they bolt on,just went on vacation to myrtle beach towing 5th wheel and leak started. dealer down there said I need to replace manifolds,turbo,doughnuts and I cant remember what else,I know their estimate was over $3,000 dollars. I was wondering if anyone has the Banks powerpack sys. and what they think of it. If I am gonna put that much into fixing exhaust I thought that might be better way to go?