K&N YA-4504 High-Flow Air Filter for 2004-2025 Yamaha YFZ450/YFZ450R

Vehicle Fitment

• 2004-2025 Yamaha YFZ450 (449cc)
• 2007-2024 Yamaha YFZ450 SE (449cc)

Fitment Notes

• Application is model- and year-specific - verify the submodel (Base, SE, Bill Balance, X, etc.) before ordering.
• Designed for OEM airbox fitment; will not fit vehicles with non-stock/modified airboxes without modification.
• Does not change engine fueling requirements under normal installation; jetting adjustments may be needed only for heavily modified engines or extreme altitude changes.
• If your motorcycle is a later/aftermarket-modified variant beyond the listed ranges, confirm compatibility with K&N or your dealer prior to purchase.

Features

• High-flow, multi-pleat cotton gauze media for increased airflow and improved throttle response
• Washable and reusable construction for long service life and reduced lifetime cost
• Pre-oiled and ready to install out of the box
• Application-specific sealing bead for direct OEM airbox fitment - no modification required
• Large filtration surface area and pleated design for extended service intervals under off-road use
• Maintains reliable carburation even in dusty/off-road conditions and at altitude
• Durable top plate and frame construction built for harsh environments
• Tested to provide increased horsepower and acceleration versus stock paper elements

Specifications

• Filter Type / Shape: Long-life panel/round (application-specific for YFZ450 family)
• Media Material: Multi-layer cotton gauze (pleated)
• Washable / Reusable: Yes
• Outside Diameter: 5.00 in (127 mm)
• Inside Diameter: 3.75 in (95 mm)
• Height: 6.25 in (159 mm)
• Filter re-oil amount (service): ~1.08 oz (32 ml)
• Package Quantity: 1x filter

Included Components

• 1x K&N YA-4504 Air Filter (pre-oiled, ready to install)
• 1x Installation / service instruction sheet

Product Description

The K&N YA-4504 is a high-flow replacement air filter engineered specifically for Yamaha YFZ450 family machines. Replacing the restrictive factory paper element with pleated cotton gauze media, the YA-4504 increases intake airflow to the engine for improved throttle response and potential performance gains while maintaining strong particle filtration suited to off-road and aggressive riding conditions.

Designed for drop-in OEM airbox fitment with an application-specific sealing bead, installation requires no permanent modification. The filter ships pre-oiled and ready to install. For maintenance, clean and re-oil per K&N instructions to restore full performance and extend service life. Ideal for riders who want a durable, serviceable filter that balances increased airflow with reliable protection for the engine.