Ok. I have a 99 with the 4.2L. I have been asking all the dang parts stores everywhere, and nobody seems to understand. My truck does not have any exhaust on it right now, so it needs it from the manifolds back. I am missing the pieces that bold to the manifold. What are they called, and where do I get them???? It is driving me nuts. The guy from the muffler shop doesnt even stock them! Thanks guys.