Hey, sorry about struggle with dp. I had a warpage in the flange flatness. If you know what I mean. Before i installed I measured how far the turbo side was out. I was concerned it would not draw after tightening down and would leak, if holes would even line up. they responded nice enough but I opened the holes up a 1/16" on centers and it was still difficult to put on. Also one of the 'studs' came out with nut attached. I hope thats what you are speaking of, put it back same way it came out. no leaks and flows like crazy. I believe the flange pulls from the heat when it is welded. They sure should fix these issues. I guess I was lucky with O2 removal. Good luck