UNI FILTER Replacement OEM Air Filter NU-8521ST for Polaris RZR and General

Replacement OEM Air Filter - Polaris

The UNI FILTER Replacement OEM Air Filter, part number NU-8521ST, is designed to fit in the stock airbox exactly like the OEM filter. Its higher airflow is intended to support higher performance while providing longer service intervals.

Before installation, the filter must be treated with oil. After use, it can be cleaned with regular grease-cutting dish soap and re-oiled for continued service. UNI FILTER states that the filter has an indefinite service life when properly cleaned and re-oiled. The filter is made in the USA.

Distributor part number: 10113502. Manufacturer part number: NU-8521ST. Vehicle fitment includes the 2016 Polaris RZR 900; 2017 Polaris General 1000 EPS; 2018 Polaris RZR S 900 and Polaris General 1000 EPS Premium; 2019 Polaris General 1000 EPS Premium; 2020 Polaris RZR S 1000 EPS; 2021 Polaris RZR Trail 900 Sport 4x4; 2022 Polaris General 1000 Sport; 2024 Polaris RZR Trail Sport; and 2025 Polaris RZR Trail Ultimate.

Features:

• Brand: UNI FILTER
• Product: Replacement OEM Air Filter
• Manufacturer Part Number: NU-8521ST
• Distributor Part Number: 10113502
• Airbox Fit: Fits in the stock airbox exactly like the OEM filter
• Airflow: Higher airflow for higher performance
• Service Intervals: Longer service intervals
• Maintenance: Clean with regular grease-cutting dish soap and re-oil
• Installation: Must be treated with oil prior to installation
• Service Life: Indefinite service life when cleaned and re-oiled
• Manufacturing: Made in the USA
• Fitment: Fits select Polaris RZR and General models from 2016 through 2025

Fitment:
2015 Polaris RZR 4 900 EPS
2015 Polaris RZR 900
2015 Polaris RZR 900 XC Edition
2015 Polaris RZR S 900
2016 Polaris ACE 900 SP
2016 Polaris General 1000 EPS
2016 Polaris General 1000 EPS Deluxe
2016 Polaris RZR 4 900 EPS
2016 Polaris RZR 900
2016 Polaris RZR 900 EPS XC Edition
2016 Polaris RZR S 1000 EPS
2016 Polaris RZR S 900
2016 Polaris RZR XP 1000 EPS
2016 Polaris RZR XP 1000 EPS High Lifter Edition
2017 Polaris ACE 900 Xc
2017 Polaris General 1000 EPS
2017 Polaris General 1000 EPS Deluxe
2017 Polaris General 1000 EPS Hunter Edition
2017 Polaris General 1000 EPS Ride Command Edition
2017 Polaris RZR 4 900 EPS
2017 Polaris RZR 900
2017 Polaris RZR 900 EPS XC Edition
2017 Polaris RZR S 1000 EPS
2017 Polaris RZR S 900
2017 Polaris RZR XP 1000 EPS
2017 Polaris RZR XP 1000 EPS Gold Matte Metallic LE
2017 Polaris RZR XP 1000 EPS High Lifter Edition
2017 Polaris RZR XP 1000 EPS Velocity Blue LE
2017 Polaris RZR XP 1000 Ride Command 4x4
2017 Polaris RZR XP 1000 Special Edition EPS
2017 Polaris RZR XP 1000 Trails and Rocks Ed. 4x4
2018 Polaris ACE 900 Xc
2018 Polaris General 1000 EPS
2018 Polaris General 1000 EPS Deluxe
2018 Polaris General 1000 EPS Hunter Edition
2018 Polaris General 1000 EPS Limited 4x4
2018 Polaris General 1000 EPS Premium
2018 Polaris General 1000 EPS Ride Command Edition
2018 Polaris RZR 4 900 EPS 4x4
2018 Polaris RZR 900
2018 Polaris RZR S 1000 EPS
2018 Polaris RZR S 900
2018 Polaris RZR XP 1000 EPS
2018 Polaris RZR XP 1000 EPS High Lifter Edition
2018 Polaris RZR XP 1000 EPS Ride Command Edition
2018 Polaris RZR XP 1000 EPS Trails and Rock Edition
2018 Polaris RZR XP 1000 High Lifter Ed. 4x4
2019 Polaris ACE 900 Xc
2019 Polaris General 1000 EPS
2019 Polaris General 1000 EPS Deluxe
2019 Polaris General 1000 EPS Hunter Edition
2019 Polaris General 1000 EPS Limited Edition
2019 Polaris General 1000 EPS Premium
2019 Polaris General 1000 EPS Ride Command Edition
2019 Polaris RZR 900
2019 Polaris RZR S 1000 EPS
2019 Polaris RZR S 900
2019 Polaris RZR XP 1000 4x4
2019 Polaris RZR XP 1000 Dynamix Ed. 4x4
2019 Polaris RZR XP 1000 EPS
2019 Polaris RZR XP 1000 EPS DYNAMIX Edition
2019 Polaris RZR XP 1000 EPS High Lifter Edition
2019 Polaris RZR XP 1000 EPS Ride Command Edition
2019 Polaris RZR XP 1000 EPS Trails and Rock Edition
2019 Polaris RZR XP 1000 High Lifter Ed. 4x4
2019 Polaris RZR XP 1000 Ride Command 4x4
2019 Polaris RZR XP 1000 Trails and Rocks Ed. 4x4
2020 Polaris General 1000
2020 Polaris General 1000 Deluxe
2020 Polaris General 1000 EPS Deluxe Ride Command Ed. 4x4
2020 Polaris General 1000 Premium
2020 Polaris General 1000 Sport
2020 Polaris General XP 1000 Deluxe
2020 Polaris RZR 900
2020 Polaris RZR S 1000 EPS
2020 Polaris RZR S 900
2020 Polaris RZR XP 1000
2020 Polaris RZR XP 1000 High Lifter Edition
2020 Polaris RZR XP 1000 Limited Edition
2020 Polaris RZR XP 1000 Premium
2020 Polaris RZR XP 1000 Trails and Rock Edition
2021 Polaris General 1000
2021 Polaris General 1000 Deluxe
2021 Polaris General 1000 EPS Deluxe Ride Command Ed. 4x4
2021 Polaris General 1000 Premium
2021 Polaris General 1000 Sport
2021 Polaris General XP 1000
2021 Polaris General XP 1000 Deluxe
2021 Polaris General XP 1000 Factory Custom Edition
2021 Polaris General XP 1000 Pursuit Edition
2021 Polaris RZR S 1000 EPS
2021 Polaris RZR Trail 900 4x4
2021 Polaris RZR Trail 900 Premium 4x4
2021 Polaris RZR Trail 900 Sport 4x4
2021 Polaris RZR Trail 900 Ultimate 4x4
2021 Polaris RZR Trail S 1000 Premium 4x4
2021 Polaris RZR Trail S 1000 Ultimate 4x4
2021 Polaris RZR Trail S 900 4x4
2021 Polaris RZR Trail S 900 Premium 4x4
2021 Polaris RZR Trail S 900 Sport 4x4
2021 Polaris RZR XP 1000
2021 Polaris RZR XP 1000 High Lifter Edition
2021 Polaris RZR XP 1000 Premium
2021 Polaris RZR XP 1000 Sport 4x4
2021 Polaris RZR XP 1000 Trails & Rocks
2022 Polaris General 1000 Deluxe
2022 Polaris General 1000 Deluxe Ride Command Edition
2022 Polaris General 1000 Premium
2022 Polaris General 1000 Sport
2022 Polaris General XP 1000 Deluxe
2022 Polaris General XP 1000 Deluxe Ride Command Edition
2022 Polaris General XP 1000 Trailhead Edition
2022 Polaris General XP 1000 Troy Lee Designs Edition
2022 Polaris RZR Trail Premium
2022 Polaris RZR Trail S 1000 Premium
2022 Polaris RZR Trail S 1000 Ultimate
2022 Polaris RZR Trail S 900 4x4
2022 Polaris RZR Trail S 900 Premium 4x4
2022 Polaris RZR Trail S 900 Sport
2022 Polaris RZR Trail Sport
2022 Polaris RZR Trail Ultimate
2023 Polaris General 1000 Sport
2023 Polaris General XP 1000 Premium
2023 Polaris General XP 1000 Sport
2023 Polaris General XP 1000 Ultimate
2023 Polaris RZR Trail Premium
2023 Polaris RZR Trail S 1000 Premium
2023 Polaris RZR Trail S 1000 Ultimate
2023 Polaris RZR Trail S 900 Premium 4x4
2023 Polaris RZR Trail S 900 Sport
2023 Polaris RZR Trail Sport
2023 Polaris RZR Trail Ultimate
2024 Polaris General 1000 Premium
2024 Polaris General 1000 Sport
2024 Polaris General XP 1000 Premium
2024 Polaris General XP 1000 Sport
2024 Polaris General XP 1000 Ultimate
2024 Polaris Ranger XD 1500 NorthStar Premium
2024 Polaris Ranger XD 1500 NorthStar Ultimate
2024 Polaris Ranger XD 1500 Premium
2024 Polaris RZR Trail S 1000 Ultimate
2024 Polaris RZR Trail S 900 Sport
2024 Polaris RZR Trail Sport
2024 Polaris RZR Trail Ultimate
2025 Polaris General 1000 Premium
2025 Polaris General 1000 Sport
2025 Polaris General XP 1000 Premium
2025 Polaris General XP 1000 Sport
2025 Polaris General XP 1000 Ultimate
2025 Polaris Ranger XD 1500 NorthStar Premium
2025 Polaris Ranger XD 1500 NorthStar Ultimate
2025 Polaris RZR Trail S 1000 Ultimate
2025 Polaris RZR Trail S 900 Sport
2025 Polaris RZR Trail Sport
2025 Polaris RZR Trail Ultimate
2026 Polaris General 1000 Premium
2026 Polaris General 1000 Sport
2026 Polaris General XP 1000 Premium
2026 Polaris General XP 1000 Sport
2026 Polaris General XP 1000 Ultimate
2026 Polaris Ranger XD 1500 NorthStar Mountaineer Edition
2026 Polaris Ranger XD 1500 NorthStar Premium
2026 Polaris Ranger XD 1500 NorthStar Ultimate
2026 Polaris RZR Trail S 1000 Ultimate
2026 Polaris RZR Trail Sport
2026 Polaris RZR Trail Ultimate