The exhaust pipe of the vortex tornado, due to the existence of the vortex groove, forms resistance to the low-speed airflow at low speed, forming back pressure, thereby increasing the 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.