Missing Words: cylinders, dirt, filter, housing. When inspecting the filter element, carefully remove all Select... from the inside of the housing. Large pieces of dirt and stones accumulate here. It would be disastrous if that dirt got into the Select... . Also make sure that the air cleaner housing is properly aligned and closed around the Select... to ensure good airflow of clean air. If the filter does not seal well in the Select... , dirt and dust can be pulled into the airstream to the cylinders