The exhaust muffler pipe is a part of the engine exhaust system. The exhaust system is very important for fuel economy and environment. The vehicle exhaust system will take away harmful gases generated in the combustion process. The exhaust system can not only prevent dangerous gases such as carbon monoxide, nitrogen oxides and hydrocarbons from entering the cab, but also "purify" the gas before it is released into the environment.

The exhaust muffler pipe system mainly includes the exhaust manifold, exhaust pipe and muffler. Generally, the three calibration catalyst to control the emission of engine pollutants is also installed in the exhaust system.
When the gas energy is released, it is no longer valuable to the engine. These gases become exhaust gases and are discharged out of the engine. After exhaust from the cylinder, the exhaust gas enters the exhaust manifold.