Well, while I was taking my driver's side manifold out to install my jethot LT's, I guess I broke the bolt off inside the head . I didn't even know I did until I was trying to install the header. Anyways, how bad do you think the leak would be if I just left it out? It's the drivers side, 2nd from the back. I was going to try and use an EZout to do it, but now i think i might take it to a welder and see if he can get it out after reading this page http://www.theherd.com/articles/manifoldbolt.html Please let me know what you think.