Exhaust Question, Nice set of pipes Options

[warrenoliver]

I just installed (IMG:style_emoticons/default/sawzall-smiley.gif) a new Bursch exhaust on my 73 2.0. The exhaust that I ordered from "the bird" has the pipes welded to the muffler. When I took off the old muffler, I noticed that the muffler is bolted to the pipes (IMG:style_emoticons/default/WTF.gif) . So, looks like even though my muffler went bad, the pipes are in pretty good shape.
Is there any value to these pipes (IMG:style_emoticons/default/confused24.gif) ? What are they called? These are the pipes that bolt directly to the heat exchanger pipes. They are attached to the 2 heat exchanger pipes with the usual 3 bolt arrangement. It seems to me that a different muffler could be attached to these pipes and someone could have a cheap replacement muffler.
Is it worth screwing around with these, or should I just pitch them along with the old/holey muffler?

Thanks.

Warrenoliver

[SGB]

I believe someone added a flange to prevent having to replace the entire unit agian. The pipes themselves are called an extractor. When I replaced my Bursch, I got just the muffler from somewhere and had it welded on. Looks to me like a PO had decided that was impractical, as was tossing the pipes with the muffler, so he welded flanges on to allow bolting up. I don't think you can buy a flanged Bursch though, It would always require at least that much modification.