The muffler is an integral part of the vehicle exhaust system. It has two main functions: to adjust and reduce the noise of the exhaust system, and to help filter the exhaust gas in the engine. When your muffler is operating normally, it may not attract your attention, but you cannot ignore it because it is not in your daily sight.

The sound of car exhaust is the exhaust wave we often say. It is exclusive to high-performance cars and supercars, and is their most distinctive business card. The melodious engine exhaust wave can not only inspire the enthusiasm and pleasure of the driver, but also the source of charm for millions of car fans.

More and more people in modern society are aware of the importance of mufflers, especially when the laws and regulations on motor vehicle pollution in various countries and regions in the world are becoming more and more perfect.

The exhaust manifold is connected to the engine, and the length and shape of the manifold can affect the performance of the engine by affecting the airflow. Related to engine performance, the exhaust manifold has a greater impact, and the back pressure caused by the exhaust system.

There are four holding and wholly-owned factories under the GRWA Group, of which the "second factory" is particularly special. Different from the high output of the first factory and the high intelligence of the fourth factory, the second factory gives people a " high-tech" feeling. The second factory focuses on the design, development, and manufacturing of automotive three-way catalytic converters, catalysts, and exhaust manifolds.