Features: 1.Fitment: The air filter element is specially designed to fit the motorcycle, replacement for WR250F WR450F YZ250F YZ250FX YZ450F YZ450FX. 2.OEM Number: Replacing manufacturer part number for reference is 1SL 14451 00. Please carefully check your OEM number before ordering. 3.Function: Regular replacement of the air filter can prevent particles such as gravel and dust from entering the engine and prolong engine life. 4.Advantage: Air filter can reduce exhaust emissions, improve combustion conditions, reduce cylinder wear, protect engine from damage. 5.Selected Material: Air cleaner element adopts durable material, the filtering effect is very significant, high performance, practical in use.Specification:Item Type: Air FilterMaterial: PVCOEM: 1SL 14451 00Fitment:Replacement for WR250F 2015-2019 Replacement for WR450F 2016-2018 Replacement for YZ250F 2014-2018 Replacement for YZ250FX 2015-2019 Replacement for YZ450F 2014-2017 Replacement for YZ450FX 2016-2018 Note:1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!