The FMF Factory 4.1 RCT Titanium Slip-On Exhaust is engineered for riders seeking strong performance, refined sound control, and durable race-focused construction. Featuring FMF Resonance Chamber Technology, this exhaust uses a patented core shape to reduce sound levels while maintaining maximum power output. Its patented canister design increases internal volume for additional sound-absorbing material, while the chamber design helps enhance and refine exhaust pressure for optimized engine performance.
Factory Forward Engineering centralizes mass and helps reduce the likelihood of crash damage. The exhaust is tuned with application-specific core specifications for the Yamaha models listed below, helping provide a precise fit and performance-oriented exhaust flow. This version features a lightweight titanium canister and mid-pipe, finished with a blue carbon fiber end cap for a distinctive, high-performance appearance.
The innovative rear end cap allows simple installation of tuning tip inserts or a spark arrestor. A spark arrestor and wash plug are included for added convenience during trail use, maintenance, and storage. The FMF Factory 4.1 RCT Slip-On is designed to fit 2019–2024 Yamaha YZ250F models and 2020–2023 Yamaha YZ250FX models. Manufacturer: FMF. Vendor part number: 044486.
Features:
- Resonance Chamber Technology: Incorporates FMF's latest chamber technology for improved sound control and performance.
- Patented Core Shape: Lowers sound levels while maintaining maximum power output.
- Patented Canister Shape: Increases internal volume for additional sound-absorbing material.
- Patented Chamber Design: Enhances and refines exhaust pressure for application-specific performance.
- Factory Forward Engineering: Centralizes exhaust mass and helps reduce exposure to crash damage.
- Application-Tuned Core: Optimized core specifications support the listed Yamaha applications.
- Rear End Cap: Allows simple installation of tuning tip inserts or a spark arrestor.
- Construction: Features a titanium canister and titanium mid-pipe with a blue carbon fiber end cap.
- Included Accessories: Includes a spark arrestor and wash plug.
- Fitment: Fits 2019–2024 Yamaha YZ250F and 2020–2023 Yamaha YZ250FX motorcycles.
Fitment:
2019 Yamaha YZ250F
2020 Yamaha YZ250F
2020 Yamaha YZ250FX
2021 Yamaha YZ250F
2021 Yamaha YZ250FX
2022 Yamaha YZ250F
2022 Yamaha YZ250FX
2023 Yamaha YZ250F
2023 Yamaha YZ250FX
2024 Yamaha YZ250F
2024 Yamaha YZ250FX
2025 Yamaha YZ250F
2025 Yamaha YZ250FX
2026 Yamaha YZ250F
2026 Yamaha YZ250FX