Graded Valve Tappet, 3.850, Part 5139458-385 is a critical component of the engine. It is designed and tested by Polaris Engineers to ensure durability, quality, and optimal performance through lab and field validation testing beyond the expected engine life. Spend less time doing tedious maintenance and more time out on the trails having fun. We've been a leader in the powersport industry for nearly 70 years, don't settle for anything less than OEM quality. This Accessory is Designed to Fit the Following: Ranger , 2025, 2020-2023, 0 RANGER 1000 Premium , 2025, 2020-2023 RANGER CREW 1000 Premium , 2025, 2020-2023 RANGER 1000 EPS , 2024-2025, 2020-2022 RANGER CREW 1000 , 2022 RANGER CREW 1000 Premium - Winter Prep Package , 2022 RANGER 1000 Premium + Winter Prep Package , 2021, 2019 RANGER 500 4X2 , 2020-2025 RANGER 1000 , 2020-2022 RANGER 500 , 2020 RANGER CREW 1000 EPS , 2018 RANGER 2X4 , 2017-2019 RANGER 500 , 2017-2018 Ranger 500 4x2 ATV , 2022-2024 Sportsman 450 H.O. Utility , 2022-2024 Sportsman 450 H.O. EPS , 2022-2024 Sportsman 450 H.O. , 2021, 2019 Sportsman 450 H.O. EPS , 2021, 2019 Sportsman 450 H.O. , 2020 Sportsman 450 EPS , 2020 Sportsman 450 , 2019 Sportsman 450 H.O. EPS Utility Edition , 2019 Sportsman 450 H.O. EPS LE