GPC air filter is located in the engine intake system and is an assembly of one or more clean air filter components. In order for the engine to function properly, a large amount of pure air must be inhaled. The main requirements of the air filter are high filtration efficiency, low flow resistance, and continuous use for a long time. Poor quality of air filters can not capture the fine particles in the air to the maximum extent, the filtration precision is low,which will result into the cylinder wear is increased by 7 times, the piston wear is increased by 3 times, and the piston ring wear is increased by 8 times. If the air filter is not replaced on time, it will cause clogging due to excessive dust accumulation on the filter paper, and the intake resistance will increase, causing the engine power to drop or the fuel consumption to increase by 5%.