For the spoon, the position of the main silencer of the exhaust pipe B was first laid out as forward as possible. The higher the exhaust temperature, the higher the muffling effect and the more it contributes to the performance of the catalyst. By adopting that layout, the exhaust pressure is stable and the exhaust efficiency is improved. It is an ideal exhaust system that can be combined with a spoon tail silencer to reduce weight and increase power and torque. Since it is the same standard flange as the genuine one, it can be combined with the genuine muffler.