FWF Honda CRF250R ('21) CRF450R ('21-22)

To accommodate the 2021 CRF450R’s updated air box design, FWF designed this filter with a flat panel design to create a more secure seal and stronger structure for the filter to further ensure no dust can penetrate the airbox. 

The Flat Panel Design:

• Compact design allows more volume in the air box
• Any dust is distributed evenly over the pyramid profile outer foam surface
• Dual foam layer construction provides additional protection without sacrificing air flow
• The filter is easier to clean, re-oil and install effectively reducing the frequency of filter changes

The Foam Profile:

• Provides a 100% larger surface to trap more dust
• Traps dust evenly over the increased outside surface area while allowing optimum airflow for longer periods of riding
• Effectively reduces the frequency of filter changes and cleanings.

The Seal:
Any air filter is only as good as its seal. Most of the genuine, Australian made, FunnelWeb Filter seals are injection moulded urethane or a die cut, urethane / foam combination.
These seals will not shrink, stretch or tear and will maintain their shape, regardless of how they are treated ensuring any air entering your engine passes through the filter foam.

In some cases, air box design dictates the use of foam only seals which is where we use die cut polyurethane foam to do the job.