Kamina patented exhaust system, reducing the corrosion of the car body and environmental pollution. Unique spark catching system, eliminating explosion danger, etc. M3 plus K2 double-layer sealing technology, leakage prevention, etc. Large current discharge can make the engine run stably at the beginning, which brings economic benefits, that is, it can prolong the service life of the engine, provide stable large current for the ignition coil, and save fuel and make the fuel burn as completely as possible. Secondly, large current can reduce the workload of the generator system and increase the service life of the generator system. Continuous and stable current can improve the use effect of air conditioner, stereo, radio and navigation system.