The PROX 01.6353.B Forged Piston Kit is a direct-replacement engine component designed for select KTM and Husqvarna 350cc four-stroke motocross and off-road motorcycles. Manufactured by PROX, this kit is engineered to provide dependable performance and an economical alternative to OEM replacement parts while maintaining direct interchangeability with the original equipment.
Designed for use with Nikasil-plated cylinders, the PROX forged piston kit includes the piston, piston rings, wrist pin, and retaining clips required for installation. The forged construction is suited to demanding engine applications, helping support reliable operation under high-performance riding conditions. The kit is supplied by the manufacturer under part number 01.6353.B and is also identified by vendor part number 19-6353B.
Fitment includes the 2017 Husqvarna FX 350; 2014 through 2017 Husqvarna FC 350; 2018 Husqvarna FC 350 and FX 350; and 2016 through 2018 KTM 350 SX-F models. Verify the motorcycle model year, cylinder configuration, and existing piston specifications before installation to ensure proper compatibility. This PROX replacement kit is intended for applications using the corresponding piston design and compression specification.
Features:
- Cost-effective alternative to OEM piston components
- Directly interchanges with applicable OEM parts
- Forged piston designed for Nikasil-plated cylinders
- Complete kit includes piston, rings, wrist pin, and retaining clips
- Manufacturer: PROX
- Manufacturer part number: 01.6353.B
- Vendor part number: 19-6353B
- Fits 2017 Husqvarna FX 350
- Fits 2014-2018 Husqvarna FC 350, with model-year application verification required
- Fits 2016-2018 KTM 350 SX-F
Fitment:
2014 Husqvarna FC 350
2015 Husqvarna FC 350
2016 Husqvarna FC 350
2016 KTM 350 SX-F
2017 Husqvarna FC 350
2017 Husqvarna FX 350
2017 KTM 350 SX-F
2018 Husqvarna FC 350
2018 Husqvarna FX 350
2018 KTM 350 SX-F
2019 Husqvarna FC 350
2019 Husqvarna FX 350
2019 KTM 350 SX-F
2020 Husqvarna FC 350
2020 Husqvarna FE 350
2020 Husqvarna FX 350
2020 KTM 350 EXC-F
2020 KTM 350 SX-F
2021 Gas-Gas EC 350F
2021 Gas-Gas EX 350F
2021 Husqvarna FC 350
2021 Husqvarna FE 350
2021 Husqvarna FX 350
2021 KTM 350 EXC-F
2021 KTM 350 SX-F
2022 Gas-Gas EC 350F
2022 Gas-Gas EX 350F
2022 Husqvarna FC 350
2022 Husqvarna FE 350
2022 Husqvarna FX 350
2022 KTM 350 EXC-F
2022 KTM 350 SX-F
2023 Gas-Gas EC 350F
2023 Gas-Gas EX 350F
2023 Gas-Gas MC 350F
2023 Husqvarna FC 350
2023 Husqvarna FE 350
2023 Husqvarna FX 350
2023 KTM 350 EXC-F
2023 KTM 350 SX-F
2024 Gas-Gas EC 350F
2024 Gas-Gas EX 350F
2024 Gas-Gas MC 350F
2024 Husqvarna FC 350
2024 Husqvarna FE 350
2024 Husqvarna FX 350
2024 KTM 350 EXC-F
2024 KTM 350 SX-F
2025 Gas-Gas EC 350F
2025 Gas-Gas EX 350F
2025 Gas-Gas MC 350F
2025 Husqvarna FC 350
2025 Husqvarna FE 350
2025 Husqvarna FX 350
2025 KTM 350 EXC-F
2025 KTM 350 SX-F