OEM high performance air filter manufactured by top brand trusted factory. Integrated molded double layer construction elements for superior filtration The double layer structure of filters with different coarse outer and thin inner surfaces prevents the intake efficiency, and protects dust from entering. Bonds with a special adhesive that resists gasoline and solvents Safe to clean and use over and over again. Provides a great seal with no grease needed for contact with the air box. Smaller and rounded shape than factory filters, improving airflow inside the airbox for superior intake efficiency. Flame retardant material is used in the sponge inside of the filter to prevent damage to the filter from backfire. Do not twist the filter with a rag to squeeze it. Allow to dry for 24 hours after oil is applied. Drying allows oil to be fixed to the air filter for maximum performance. In addition, if the oil is soaked and installed immediately and it may cause the oil to be absorbed into the carburetor and engine failure.