The facts.
| Brand | BMC |
|---|---|
| Part Number | FM595/04 |
| Filter Type | Drop-in replacement air filter |
| Filter Medium | Four-layer oiled cotton gauze |
| Frame Material | Rubber |
| Protective Surround | Aluminium mesh |
| Fitment | Yamaha YZF-R6 RJ15, RJ27 (2008-2026) |
| Reusable | Yes — washable and re-oilable |
DescriptionThe whole story▼
Developed with direct input from the race paddock, the BMC FM595/04 drop-in air filter for the Yamaha YZF-R6 RJ15 and RJ27 delivers the kind of unrestricted airflow that separates a strong road bike from a track weapon. Its four-layer cotton gauze construction, treated with a low-viscosity oil, maximises airflow while maintaining filtration efficiency that a standard paper element simply cannot match.
Key Features
- Four-layer oiled cotton gauze construction optimises airflow for improved throttle response and peak power output on road and circuit
- Low-viscosity oil treatment achieves the balance between maximum air throughput and superior particulate filtration, keeping the engine cleaner under sustained high-rpm use
- Aluminium mesh surround guards against fuel vapour degradation and oxidation, ensuring the filter retains its structure even in demanding race environments
- Rubber frame prevents cracking and provides a reliable, vibration-resistant seal against the airbox
- Washable and reusable — a single filter outlasts dozens of disposable paper elements, reducing long-term running costs and waste
- Validated against international test procedures to confirm consistent quality and filtration performance
Race-Derived Performance
BMC has built its reputation supplying air filtration solutions to motorsport teams at the highest level, and that engineering philosophy flows directly into the FM595/04. The four-layer cotton medium is calibrated to reduce intake restriction at the high engine speeds the R6 inline-four demands on track, where every fractional gain in volumetric efficiency translates to measurable improvements in acceleration and top-end drive. Reduced pressure drop across the filter element means the fuel injection mapping is working with a cleaner, denser charge — the kind of marginal gain that matters when lap times are the priority.
Build Quality & Longevity
Where a paper filter is a consumable, the BMC FM595/04 is an investment. The aluminium mesh cage protects the cotton layers from fuel vapour and oxidation, two of the main causes of premature filter failure in a performance airbox. The rubber perimeter frame creates a consistent seal against the airbox housing, eliminating bypass air that would otherwise carry unfiltered particles into the engine. When the filter eventually requires servicing, a standard BMC cleaning kit restores it to full performance — no specialist tools, no workshop visit required.
Fitment & Compatibility
The FM595/04 is a direct OEM replacement drop-in filter requiring no airbox modification. It fits the following Yamaha models:
- Yamaha YZF-R6 RJ15 (2008 onwards)
- Yamaha YZF-R6 RJ27 (through to 2026)
Specifications
- Part number: FM595/04
- Brand: BMC
- Filter type: Drop-in replacement air filter
- Filter medium: Four-layer oiled cotton gauze
- Frame material: Rubber
- Protective surround: Aluminium mesh
- Fitment: Yamaha YZF-R6 RJ15, RJ27 (2008-2026)
- Reusable: Yes — washable and re-oilable
FitmentWhich bikes this fits▼
- Yamaha YZF-R6 RJ15 RJ27 (2008–2026)
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