H.P. wrote:

Well, I wasn't aware - (the Cessna/King course doesn't cover it) - but they
don't muffle much.

As with anything, you learn about them when you have to replace them at the
annual. Canada has a blanket AD for annual muffler inspections to reduce
the risk of CO poisoning, so our AMEs (=A&Ps) tend to find muffler problems
early and often.


All the best,


David