Originally Posted by disston
You need the proper tool for removing the exhaust flange nut. When using the correct tool if it starts to feel stuck you should feel it and at that point cut the nut off. These threads are to be coated with anti-seize. Many recommend other brands. I use the Permatex, silver one.
I have the fin wrench, but it's the cast/aluminum-ish one. But maybe it'll still work fine. I also use anti-seize on almost everything. The silver stuff: # 133H.