Universal drum No.13 is made of stainless steel material. Generally speaking, the head and middle of the exhaust pipe are made of stainless steel, and there are also all titanium alloy products, mainly for lightweighting. The total weight will differ by 3kg, which is very valuable for racing cars where speed is money. Ordinary products are made of stainless steel. Stainless steel will oxidize to yellow above 200 degrees Celsius, and to gray blue between 700-800 degrees Celsius. In the same situation, if titanium alloy material oxidizes, the color will be more vibrant. There are various materials for the short tail of exhaust pipes, and usually the original factory uses aluminum alloy or stainless steel. However, in recent years, new cars have also directly used titanium alloy tail lengths. In addition to titanium alloy and aluminum alloy, the modified tail lengths are mostly made of stainless steel and carbon fiber. Lightweight carbon fiber, but carbon fiber is also very fragile. Have you heard of resonance fracture carbon fiber? Many exhaust systems, especially two cylinder cars, will rupture if the vibration frequency resonates with the natural frequency after maintaining a certain speed for a period of time.
