"New" leak is most probably a rust through on the lower exhaust pipe section from the lower right angle bend to the pre muffle / resonator. Go to a muffler shop and have them fabricate and weld in a replacement section from the right angle bend [which should be OK, the moisture accumulates in the horizontal section of the tubing] and the horizontal section to the resonator. Worked for me, and works to this day.The original down pipe with the "deformed" D shaped cross section is not available as a replacement, although some users on this forum have found an oval pipe that seems to work.
NO! I am too lazy to do your search for this oval tube! I don"t need it and will not spend time which you should be using as a follow up.
Edited by MikeRL411, 08 February 2018 - 11:33 PM.