On my Wifes 38' sloop, The diesel had a 14" piece of stainless flex pipe, going
straight up from the manifold, to the muffler. It developed a few leaks.
I ended up taking it to a place in NW Portland, OR, called Petersons. They sell
hosing, etc.
They cut off the 2 end fittings, and welded a new section of flex pipe on, for
a total of $20! And had it done the next day!
I usually can't find a welder to do anything for less than $30.
The flex pipe was in the orig design, and works fine. But like "Danforth" type
anchors, all are not created equal!
Good luck, Cliff, S/V Lightnin'