Hi Bill,
  What I am proposing is to use the springs on the 4 corners of the muffler, i.e, suspend the muffler.  This idea is for mufflers mounted under the
  fuselodge, not in the engine compartment.  This is an effort to remove the muffler harmonics from the floors of the aircraft.  I HOPE that the
  springs will get enough airflow to keep them from overheating.

  Ken P.

Ken, I thought you wanted to use them on the header to engine flange. On the muffler the springs should be fine.
Bill Jepson

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