K&N Engineering knnYA-4518XD High-Flow Replacement Air Filter

The K&N High-Flow Air Filter for SxS / ATV, UTV is engineered to increase airflow for improved horsepower, acceleration, and throttle response while protecting your engine. Built with premium oiled cotton gauze, this washable and reusable air filter offers a precision OEM-style fit and rugged construction for long-lasting performance on the trail, in the dunes, or on the job. The K&N High-Flow Air Filter for SxS / ATV, UTV is engineered to increase airflow for improved horsepower, acceleration, and throttle response while protecting your engine. Associated products: 25-4518 Air Filter Foam Wrap, 99-5000 Filter Care Service Kit Aerosol

• Designed to provide increased horsepower and acceleration specifically developed for Off-Road, Motocross, ATVs, UTVs and Side by Sides
• BUILT FOR DURABILITY: High dust holding capacity and rugged construction designed to perform in demanding driving conditions.
• Fits directly into OEM air box with application specific sealing bead ensuring a precise fit
• Pleated media provides a large filtration area offering long service intervals
• No fuel management modifications are required to obtain increased performance
• Multiple layers of woven cotton gauze media offers excellent filtration
• Washable & reusable, most are pre-oiled and ready to ride
• One Year Limited Warranty

The K&N Engineering knnYA-4518XD High-Flow Air Filter is designed for select Yamaha off-road motorcycles, including YZ and WR models. Its high-flow design supports improved horsepower, acceleration, and throttle response while helping protect the engine in demanding riding conditions. The filter installs directly into the OEM air box and uses an application-specific sealing bead for a precise fit.

Built with multiple layers of woven, oiled cotton gauze media, the washable and reusable filter provides excellent filtration and a large filtration area for long service intervals. Its rugged construction offers high dust-holding capacity for trail, dune, motocross, and other off-road applications. No fuel-management modifications are required to obtain the increased performance described by the manufacturer. The filter is most often pre-oiled and ready to ride and includes a One Year Limited Warranty.

Key Features & Performance Benefits

• High-flow performance: Designed to increase airflow for improved horsepower, acceleration, and throttle response.
• Durable filtration: Multiple layers of woven cotton gauze provide excellent filtration and high dust-holding capacity.
• OEM-style installation: Fits directly into the OEM air box with an application-specific sealing bead.
• Reusable construction: Washable and reusable design supports long service intervals.

Key Product Specifications & Technical Data

• Brand: K&N Engineering
• Part number: knnYA-4518XD
• Product type: Powersports replacement air filter
• Application: Off-road motorcycles
• Filter media: Oiled cotton gauze
• Construction: Pleated, multilayer filtration media
• Maintenance: Washable and reusable
• Warranty: One Year Limited Warranty

What's Included in the Box

One K&N Engineering high-flow replacement air filter.

Fitment

Fits 2018 Yamaha YZ450F; 2019 Yamaha YZ250F, YZ450F, YZ450FX, and WR450F; 2020 Yamaha YZ250F, YZ450F, YZ450FX, and WR450F; and 2021 Yamaha YZ250F.

Fitments:
2018 Yamaha YZ450F Base
2019 Yamaha WR450F Base
2019 Yamaha YZ250F Base
2019 Yamaha YZ450F Base
2019 Yamaha YZ450FX Base
2020 Yamaha WR450F Base
2020 Yamaha YZ250F Base
2020 Yamaha YZ450F Base
2020 Yamaha YZ450FX Base
2021 Yamaha YZ250F Base
2021 Yamaha YZ250F Monster Energy Yamaha Racing Edition Base
2021 Yamaha YZ450F Base
2021 Yamaha YZ450F Monster Energy Yamaha Racing Edition Base
2021 Yamaha YZ450FX Base
2022 Yamaha YZ250F Base
2022 Yamaha YZ250F Monster Energy Yamaha Racing Edition Base
2022 Yamaha YZ450F Base
2022 Yamaha YZ450F Monster Energy Yamaha Racing Edition Base
2022 Yamaha YZ450FX Base
2023 Yamaha YZ250F Base
2023 Yamaha YZ250F Monster Energy Yamaha Racing Edition Base
2023 Yamaha YZ450FX Base

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: powersports
Epa: N/A
Regular Stock: t
Units Per Sku: 1