FMF
Factory 4.1 RCT Slip-On Muffler - Blue Anodized Titanium with Carbon Fiber End Cap - EX/MC
Part # 1821-1921
$854.99
In Stock
- 60-day returns
- Free shipping over $100
- Secure checkout
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Confirmed fit for 50 motorcycle configurations across KTM, Husqvarna, and Gas Gas, model years 2018–2023.
| Years | Make & Model |
|---|---|
| 2018-2022 KTM 450 XC-F | |
| 2018-2022 KTM 350 XC-F | |
| 2022-2023 Gas | Gas MC 350F |
| 2018-2022 KTM 450 SX-F | |
| 2021-2023 Gas | Gas MC 450F |
| 2018-2022 KTM 350 SX-F | |
| 2021-2023 Gas | Gas EX 450F |
| 2021-2023 Gas | Gas EX 350F |
| 2018-2020 KTM | 450 SX-F Factory Edition |
| 2019-2022 Husqvarna | FC350 |
| 2019-2022 Husqvarna | FC450 |
| 2019-2022 Husqvarna | FX450 |
| 2019-2022 Husqvarna | FX350 |
- RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output
- Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire range of power
- FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage
- Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws
- Compatible with stock header or FMF header
- Meets AMA and FIM sound requirements
- QuietCore 94 dB insert included
- Spark arrestor included in muffler
- Made in the USA
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Overview
The FMF 1821-1921: Factory 4.1 RCT Slip-On Muffler - Blue Anodized Titanium with Carbon Fiber End Cap - EX/MC. Confirmed fit for 50 motorcycle configurations across KTM, Husqvarna, and Gas Gas, model years 2018–2023. Ships from Greasemoto — a veteran-owned motorcycle parts shop in Fort Worth, TX — with free U.S. shipping on orders over $100.
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