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    re: "... hen brand new do the mild steel down pipes ever show any
    sign of flex?"<br>
    <br>
    If you mean does the flexible section, well, flex?  Yes, they do;
    maybe an inch or two of deflection at the end.<br>
    <br>
    Bob<br>
    <br>
    <div class="moz-cite-prefix">On 10/24/2019 6:52 AM, Neil McDonald
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAM8RsFcAu-9EGm0CEKDwxyEhHW31JoaKqKvjb3_pOd1qim2ojw@mail.gmail.com">
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        <div dir="auto">An exciting subject indeed!</div>
      </div>
      <div dir="auto"><br>
      </div>
      <div dir="auto">I am about to fit an unused mild steel down pipe
        that I have had on the shelf for maybe ten years. No sign of
        rust but I am away from home right now so can not test it for
        flex. I might zap it with WD40 before fitting - can’t hurt. </div>
      <div dir="auto"><br>
      </div>
      <div dir="auto">The question is - when brand new do the mild steel
        down pipes ever show any sign of flex?</div>
      <div dir="auto"><br>
      </div>
      <div dir="auto">Neil</div>
      <div dir="auto">BN6</div>
      <div><br>
        <div class="gmail_quote">
          <div dir="ltr" class="gmail_attr">On Thu, Oct 24, 2019 at 2:42
            PM Perry via Healeys <<a
              href="mailto:healeys@autox.team.net"
              moz-do-not-send="true">healeys@autox.team.net</a>>
            wrote:<br>
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            .8ex;border-left:1px #ccc solid;padding-left:1ex">
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                <p class="MsoNormal">Listers</p>
                <p class="MsoNormal">As a follow up to my post on 10/18
                  on this exciting subject, I decided to do an
                  experiment with a couple downpipes I had in the parts
                  bin. Both pipes are new old stock and have never been
                  on a car.  One is stainless and the other mild steel.
                  Both have been laying on a shelf in the garage for at
                  least 9 years. </p>
                <p class="MsoNormal">The test was to measure how much
                  deflection was noted in the flex portion of the
                  downpipe when the tip (where it enters the muffler) is
                  loaded with a weight. The upper portion of the pipe
                  was firmly held by the bench vice. </p>
                <p class="MsoNormal">Should have started with something
                  less then 10 pounds but the stainless moved
                  considerably under that weight.  The mild steel did
                  not budge.</p>
                <p class="MsoNormal">At 47 pounds I heard a creaky noise
                  but no movement on the mild steel. I then applied an
                  unspecified force with my hand to the 47 pounds and no
                  movement. </p>
                <p class="MsoNormal">My conclusion is that the mild
                  steel flex pipe, once it takes a set, ie, Gets Rusty,
                  does not flex. It is the weak link that will fail but
                  it might as well be a piece of regular pipe.</p>
                <p class="MsoNormal">Perry</p>
                <p class="MsoNormal"> </p>
                <p class="MsoNormal">Sent from <a
                    href="https://go.microsoft.com/fwlink/?LinkId=550986"
                    target="_blank" moz-do-not-send="true">Mail</a> for
                  Windows 10</p>
                <p class="MsoNormal"> </p>
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      -- <br>
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                  <div>
                    <div>____________________<br>
                      Neil & Pam McDonald<br>
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