Have Questions?
The RFX Pre-Oiled Air Filter is a direct-fit replacement air filter for select KTM, Husqvarna, and GasGas motorcycles. Manufactured by Multi Air, this filter is designed to support dependable airflow and effective dirt protection for riders at every level, from recreational enthusiasts to serious off-road competitors. Its precise fitment helps simplify installation while maintaining reliable filtration performance.
Built with breathable, twin-layered foam, the RFX filter helps provide consistent engine air supply while capturing dirt and debris before they reach the engine. The pre-oiled design helps reduce preparation time, allowing for convenient installation and service. Nonflammable foam is used on all four-stroke models for added suitability in demanding riding environments.
With more than 30 years of experience, Multi Air produces filtration products trusted across the powersports industry. The RFX brand combines practical design, dependable materials, and application-specific fitment in the FXAF 50001 55PO air filter. Choose this replacement filter when you need a reliable service part for compatible KTM, Husqvarna, or GasGas models.
Features:
- Breathable twin-layered foam supports consistent airflow and filtration.
- Pre-oiled design helps simplify installation and routine maintenance.
- Nonflammable foam is used on all four-stroke models.
- Application-specific fitment for select KTM, Husqvarna, and GasGas motorcycles.
- Manufactured by Multi Air for the RFX brand.

