QUOTE(Van B @ Mar 9 2022, 10:20 PM)
Thomas Otten has a video on YouTube talking through the differences.
Basically, 1.7 and 1.8 have the same rear flange and are kicked up at the exit. But the 1.8 and 2.0 are the same, larger diameter of pipe compared to the 1.7.
Good luck with the muffler search!
Where about in Maryland are you?
My heat exchangers are kicked up so they are definitely 1.7.
I live in Adamstown, just south of Frederick.