In the exhaust pipe of the vortex tornado, the existence of the vortex groove at low speed forms resistance to the low-speed air outlet, forming a back pressure, which can block energy and improve low-speed torque. At high speed, the exhaust gas forms a vortex, which accelerates the exhaust gas and improves the exhaust efficiency, thereby increasing the power. The existence of the vortex groove can gradually absorb the energy of the sound wave, thereby changing the shortcomings of many car resonances. The presence of the vortex grooves makes the sound better and the sound waves more pronounced.