The K&N BM-1821 motorcycle air filter for the BMW R 18 features a multilayer, pleated cotton filter medium that improves airflow and traps contaminants. It is washable and reusable, and installs in the motorcycle’s original airbox.
The filter is designed to increase power and improve acceleration. The K&N Recharger® cleaning and maintenance kit can be used to clean and recharge it; service intervals depend on riding conditions.
- Type: Motorcycle air filter
- Filter material: Multilayer, pleated cotton
- Features: Washable and reusable
- Installation: In the original airbox
- Compatibility: BMW R 18
- Cleaning: With the K&N Recharger® kit