The DNA air filter for the BMW R 18 uses multiple layers of oil-impregnated cotton gauze sandwiched between two layers of wire mesh. Its airflow is 124.30 CFM, an increase of 22.35% over the OEM filter’s 101.60 CFM, while filtration efficiency ranges from 98% to 99%.
The mesh is made from 5000-series marine-grade aluminum and has an epoxy coating to protect against oxidation. The polyurethane elastomer frame holds the filter media in place and absorbs vibration, while the EVA gasket helps ensure an airtight seal. The filter oil is resistant to moisture and ultraviolet radiation.
- Type: Motorcycle air filter
- Compatibility: BMW R 18
- Filter media: 4-layer oil-impregnated cotton gauze
- Wire mesh layers: 2
- Mesh material: 5000-series marine-grade aluminum
- Mesh coating: Epoxy
- Frame material: Polyurethane (PU) elastomer
- Gasket material: EVA
- Airflow: 124.30 CFM
- OEM filter airflow: 101.60 CFM
- Airflow increase: 22.35%
- Filtration efficiency: 98–99%
- Filter oil resistance: Moisture and ultraviolet radiation