What is the name of this place? What are the consequences of breakage? Is it necessary to replace it?

This place is the soft connection of the exhaust pipe. The purpose of adding soft connection in the middle of exhaust pipe is to reduce the damage to parts caused by internal attraction caused by thermal expansion and cold contraction of exhaust pipe when the high temperature difference changes.

The soft connection has several layers of protection, and the damage of the outer metal mesh does not affect the use effect.