The WOSSNER Piston Kit in 87.95 mm size is designed for select Gas Gas, Husqvarna, and KTM applications. Manufacturer part number 4091DA. The kit includes the piston, rings, pin, and clips.
Made from aerospace-grade aluminum alloy, the piston features a permanent skirt coating intended to reduce friction and piston rock for quiet operation and improved performance. Optimized machining supports reduced weight while maintaining strength in key areas, including the crown and skirt wall cross section.
Vehicle fitment includes the 2024 Husqvarna FC350, 2024 Husqvarna FE350S, 2025 Husqvarna FX350 Heritage, 2024 Gas Gas MC 350F, 2025 Gas Gas MC 350F, 2026 KTM 350 XC-F Factory Edition, 2024 Husqvarna FE 350 Pro, 2024 KTM 350 XC-F, 2025 Gas Gas ES 350, and 2025 Husqvarna FE 350S Heritage. Distributor part number: 09106843. Manufacturer part number: 4091DA.
Features:
- Brand: WOSSNER
- Product: Piston Kit
- Size: 87.95 mm
- Material: Forged aerospace-grade aluminum alloy
- Skirt coating: Permanent coating designed to reduce friction and piston rock
- Machining: Optimized for lightness while maintaining strength in key areas
- Included components: Piston, rings, pin, and clips
- Fitment: 2024 Husqvarna FC350; 2024 Husqvarna FE350S; 2025 Husqvarna FX350 Heritage; 2024 and 2025 Gas Gas MC 350F; 2026 KTM 350 XC-F Factory Edition; 2024 Husqvarna FE 350 Pro; 2024 KTM 350 XC-F; 2025 Gas Gas ES 350; 2025 Husqvarna FE 350S Heritage
- Distributor part number: 09106843
- Manufacturer part number: 4091DA
Fitment:
2023 Husqvarna FC350
2023 Husqvarna FX350
2023 Husqvarna FX350 Heritage
2023 KTM 350 SX-F
2023 KTM 350 XC-F
2024 Gas Gas EC 350F
2024 Gas Gas ES 350
2024 Gas Gas EX 350F
2024 Gas Gas MC 350F
2024 Husqvarna FC350
2024 Husqvarna FE 350
2024 Husqvarna FE 350 Pro
2024 Husqvarna FE350
2024 Husqvarna FE350S
2024 Husqvarna FX350
2024 KTM 350 EXC-F
2024 KTM 350 SX-F
2024 KTM 350 XC-F
2024 KTM 350 XW-F
2025 Gas Gas ES 350
2025 Gas Gas EX 350F
2025 Gas Gas MC 350F
2025 Husqvarna FC350
2025 Husqvarna FE 350S Heritage
2025 Husqvarna FE350S
2025 Husqvarna FE350S Heritage
2025 Husqvarna FX350
2025 Husqvarna FX350 Heritage
2025 KTM 350 EXC-F
2025 KTM 350 SX-F
2025 KTM 350 XC-F
2026 Husqvarna FE350S
2026 Husqvarna FX350
2026 KTM 350 EXC-F
2026 KTM 350 SX-F
2026 KTM 350 XC-F Factory Edition
2027 KTM 350 SX-F