68k miles and has had DPF/EGR delete for about 2 years. Now I'm getting a louder whistle under acceleration. Found out it's leaking from the exhaust manifold and needs to be replaced because they tend to shrink. Most of the 68k miles have been towing so while it's not a lot of miles it is...
Did you ever get any more info on the manifold? I have found out I have an exhaust leak and the manifold is shrunk or warped. I've heard about 2 piece ones but I'm not sure that's the best bet. What did you end up doing on yours?
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