FMF
Factory 4.1 RCT Slip-On Muffler - Anodized Titanium with Carbon Fiber End Cap - CRF450X
Part # 1821-1978
$749.99
In Stock
- 60-day returns
- Free shipping over $100
- Secure checkout
CA Prop 65 Warning: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
Confirmed fit for 7 motorcycle configurations across Honda, model years 2019–2025.
| Years | Make & Model |
|---|---|
| 2019-2025 Honda | CRF450X |
- 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
Customer Reviews
No reviews yet — be the first to review this part.
Overview
The FMF 1821-1978: Factory 4.1 RCT Slip-On Muffler - Anodized Titanium with Carbon Fiber End Cap - CRF450X. Confirmed fit for 7 motorcycle configurations across Honda, model years 2019–2025. Ships from Greasemoto — a veteran-owned motorcycle parts shop in Fort Worth, TX — with free U.S. shipping on orders over $100.
More from FMF
FMF
FMF12-002
Muffler Packing - 2-Stroke
$10.99
FMF
1860-0828
Pillow Muffler Packing - 4-Stroke
$31.99
FMF
FMF011231
Puller Tool - Exhaust Spring - T-Handle - Black
$15.99
FMF
1861-0585
Wash Plug - 2-Stroke
$5.99
FMF
25014693
Machinist Hat - Black
$32.00
FMF
1820-0175
Factory Fatty Pipe
$329.99
FMF
2501-4537
Powerhouse Hat - Black
$34.00
FMF
1820-0739
Powercore 4 Exhaust
$279.99