The weight of a .035 thick SS muffler ten inches long
and eight inches in diameter is about 2.6 pounds
plus .53 pounds for each end. Or about 3.66
pounds total. Not counting the flanges or tail pipe.
SS is about .3 pounds per cubic inch.

If you made it out of .065 SS it would weigh 6.8 pounds.
or about 3.1 pounds more. For that 3.1 pounds you are talking
about $1000 more made out of Inconel or Titanium..

Frankly I would go for the .065 thick SS muffler.

-- 
Paul Lamar
 
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