The All Balls 18-9044 Caliper Piston Kit is designed to rebuild one compatible brake caliper on select Polaris Ranger and RZR models. Each kit includes the piston or pistons required for one caliper rebuild, helping restore proper brake function and dependable caliper performance. The piston is precision machined from high-grade 304 stainless steel for durable service in demanding powersports applications.
Stainless steel construction reduces thermal conductivity by up to 93% compared with aluminum, helping limit heat transfer through the caliper piston. This design also avoids common issues associated with plastic composite pistons, which may become brittle or damaged with age, as well as OEM chrome-plated steel and aluminum pistons that can be vulnerable to corrosion. The kit also eliminates failure-prone ceramic inserts used on some KTM applications.
Designed for fitment on select 2019–2022 Polaris off-road vehicles, the All Balls 18-9044 piston kit fits the 2019 Polaris Ranger XP 1000 EPS; 2021–2022 Polaris Ranger XP 1000 Trail Boss; 2020 Polaris RZR Pro XP 4; 2020 Polaris RZR Pro XP 4 Premium; 2021 Polaris RZR Pro XP 4 Sport, Premium, and Ultimate; and 2022 Polaris RZR Pro XP 4 Sport and Premium. Verify the vehicle model and caliper application before installation. The manufacturer part number and vendor part number are both 18-9044.
Features:
- Construction: Precision machined from high-grade 304 stainless steel
- Heat management: Reduces thermal conductivity by up to 93% compared with aluminum
- Durability: Avoids brittleness and damage associated with aging plastic composite pistons
- Corrosion resistance: Replaces OEM chrome-plated steel and aluminum pistons that may corrode
- Design: Eliminates failure-prone ceramic inserts found on some KTM caliper applications
- Rebuild coverage: Includes the piston or pistons needed to rebuild one caliper
- Fitment: Fits select 2019–2022 Polaris Ranger XP 1000 and Polaris RZR Pro XP 4 models
- Brand: All Balls
- Manufacturer part number: 18-9044
- Vendor part number: 18-9044
Fitment:
2019 Polaris Ranger XP 1000 EPS
2020 Polaris Ranger XP 1000 EPS
2020 Polaris RZR Pro XP 4
2020 Polaris RZR Pro XP 4 Premium
2021 Polaris Ranger XP 1000 EPS
2021 Polaris Ranger XP 1000 Trail Boss
2021 Polaris RZR Pro XP 4 Premium
2021 Polaris RZR Pro XP 4 Sport
2021 Polaris RZR Pro XP 4 Ultimate
2022 Polaris Ranger XP 1000 Trail Boss
2022 Polaris RZR Pro XP 4 Premium
2022 Polaris RZR Pro XP 4 Sport
2022 Polaris RZR Pro XP 4 Ultimate
2023 Polaris Ranger XP 1000 Premium
2023 Polaris Ranger XP 1000 Trail Boss
2023 Polaris RZR Pro XP 4 Premium
2023 Polaris RZR Pro XP 4 Sport
2023 Polaris RZR Pro XP 4 Ultimate
2024 Polaris Pro XD Mid-Size Gas
2024 Polaris Ranger XP 1000 Premium
2024 Polaris Ranger XP 1000 Trail Boss
2024 Polaris RZR Pro XP 4 Premium
2024 Polaris RZR Pro XP 4 Sport
2024 Polaris RZR Pro XP 4 Ultimate
2024 Polaris RZR XP 4 1000 Sport
2025 Polaris Pro XD Mid-Size Gas
2025 Polaris RZR Pro XP 4 Premium
2025 Polaris RZR Pro XP 4 Sport
2025 Polaris RZR Pro XP 4 Ultimate