to clarify, I have a Ryobi battery powered reciprocating saw. I am leaning towards giving it a shot this weekend. I think a muffler shop would end up cutting it, anyway. The threads on both bolts look pretty nasty.I chopped mine at the muffler side. Another option is a hordless Hackzall, which is much easier into tight places than a Sazwall. With a short blade you could probably chop it right near the flange, making it easy to patch in the future with a short coupler section (possibly being clamped without any welding at all).