Polished into a mirror round shape, T304 stainless steel tip, 2.75-inch entrance x 14-inch long exit, and many drum types. It is customary in China to divide the tail drum into straight drum, G drum and S drum. In foreign countries, according to the final effect, it can be divided into straight exhaust drum and back pressure drum, which can reduce the noise of engine exhaust pipe and make the high-temperature exhaust gas safely and effectively discharged. As a part of the exhaust pipe, the muffler shall ensure that the exhaust pipe is unobstructed, with low resistance and sufficient compressive strength. The muffler can withstand the high temperature exhaust pipe of 500℃~700℃, so as to ensure that it will not damage or lose the actual silencing effect within the specified driving mileage of the automobile.