The function of Heavy Duty Filter:

For a sound operation of the engine, there must be a lot of pure air is inhaled substances(dust,colloid,alumina,acidification iron,etc)in the air inhaled into the engine, cylinder and piston assembly will increase the burden,marking cylinder and piston components abnormal wear that would mixed with engine oil, and more substantial wear is possible which may result in the deterioration of the engine performance, shorten the engine life, and prevent engine wear. At the same time,air filter obtains silencer function.