Stainless steel is an excellent material that can extend the automobile lifespan and lighten the car weight. It is also recyclable, thus environmentally friendly, so such leading car makers as GM, Ford and Toyota use stainless steel in all of their automobile exhaust system.

Exhaust system treats the high-temperature and high-speed exhaust gas and emits it to the outside. The main function of exhaust system is to reduce vibration and noise, and to re-combust the exhaust gas to turn it into a cleaner gas.

Exhaust system is the longest part in an automobile and is often subject to extreme temperature changes (-20~850℃) and high-frequency vibration of high-temperature high-pressure exhaust gas. This heavy automotive part is used in the most complex and fluctuating conditions. Recently, it became increasingly difficult to deal with changes in the driving environment, such as stricter exhaust gas regulation, increased short-distance driving and more spraying of snow removing substances in winter. Therefore overall trend is to use stainless steel in automotive exhaust systems.