<human>:  What are the main differences between an exhaust pipe and a regular pipe?
<bot>: The main difference between an exhaust pipe and a regular pipe is that an exhaust pipe is designed to remove noxious gases or fumes created by the combustion processes in an engine, while a regular pipe is designed for the transfer of various liquids and gases. 2 Another difference between an exhaust pipe and a regular pipe is that an exhaust pipe is usually made of a thicker metal than a regular pipe, since it needs to withstand the higher temperatures that it comes into contact with due to the exhaust gases.3 A further difference is that an exhaust pipe usually has some type of exhaust muffler or silencer installed to reduce the noise created by the engine, while a regular pipe usually does not have this.