According to the Nissan parts diagram, there should be some kind of gasket there.
208 Catalyst Converter :: Exhaust & Cooling :: Genuine Nissan Parts :: 370Z Parts (Z34) 2009-2010 :: Nissan Parts, NISMO and Nissan Accessories - Courtesyparts.com
And about the quotes. Normally, people break it up in order to prevent confusion on what's being commented on. For example:
specific quote
then comment on that quote
new quote
then comment on that quote
The second comment has nothing to do with the first quote and vice versa.