It is not normal to have a sound coming out of there. If the tailpipe is
a replacement tailpipe, the people who replaced it might fix it for
free. It should cost like $15 to 20 to around $150 to either replace
just the section of tail pipe or to replace the whole thing.
It is a safety issue, because if CO (carbon monoxide) and other gases
are coming out of the tailpipe under the car, it is more likely that you
will the CO poisoning from exhaust gas coming through the floor or
otherwise get in the car.
Hard to say without seeing it.
I would take it to a reputable private exhaust shop. They may be able
to repair it or patch in a short length of pipe, if the rest of the
system is sound.
In my experience, chains are more likely to want to replace
Don Byrer KJ5KB
Radar Tech & Smilin' Commercial Pilot Guy
Glider & CFI wannabe
"I have slipped the surly bonds of earth; now if I can just land without bending
"Watch out for those doves...<smack-smack-smack-smack...>"
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