In addition, the "more to the story on your rust problem that we don't know about" that you refer to as something I'm not telling everyone is that my poly headers were only coated on the outside, unlike their other headers. As they stated and I posted, "We have sent a new set of headers to our coaters for ceramic coating and they will be adding a thermal barrier inside for additional protection." It appears there was an assumption made in this thread. I'm hopeful that TTI will now coat all the poly headers with the thermal barrier on the inside. Sounds like a win win.