The Exhaust Pipe
There are several different configurations of exhaust pipe systems, 2 common examples are
The single system (1 tailpipe at the rear of the vehicle) or
The twin system, (2 tailpipes at the rear of the vehicle)
The piping itself has the role of connecting the various components and directing the gases away from the vehicle.
Due to the heat generated in an exhaust system sometimes the piping builds up condensation that sits in the pipes and may eventually rust through, causing the system to become noisy and allow gases to escape under the vehicle instead of being directed out the rear.
A damaged system will usually generate an increase in noise and should be inspected and serviced by qualified technicians.