END OF LINE FACTORY 4.1 RCT EXHAUST SILENCER 17-20 HONDA CRF 450 R RX RWE - FMF 041559
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 18+, T&Cs apply
The FMF Factory 4.1 RCT incorporates Resonance Chamber Technology both internally and externally. It features a shorter overall length that is less susceptible to crash damage and utilizes Factory Forward Engineering, moving the muffler closer to the motor to centralize mass. Constructed from aerospace-grade materials to exacting specifications and manufactured in Southern California. This is a slip-on, single configuration exhaust. Construction materials include aluminum, stainless steel midpipe, and a carbon endcap. Includes a screen insert spark arrestor and a 94 dB quiet insert. For closed course use only. Use with FMF header #041555 only. Item ID 041559.
- SKU
- 06-1981.FMF.FAC
- Brand
- FMF Exhausts
- Availability
- In Stock (3)
Fitments (9)
| Make | Model | Year |
|---|---|---|
| HONDA | CRF 450R | 2017 |
| HONDA | CRF 450R | 2018 |
| HONDA | CRF 450R | 2019 |
| HONDA | CRF 450R | 2020 |
| HONDA | CRF 450RX | 2017 |
| HONDA | CRF 450RX | 2018 |
| HONDA | CRF 450RX | 2019 |
| HONDA | CRF 450RX | 2020 |
| HONDA | CRF RWE 450 | 2019 |
- General Product Group
- Exhaust Systems & Parts
- General Product Type
- Silencer
- Variant Id
- 209590
FULL DESCRIPTION
FMF Factory 4.1 RCT Exhaust Silencer
The FMF Factory 4.1 RCT exhaust silencer incorporates the latest advancements in FMF Resonance Chamber Technology™ both internally and externally. Its design features a shorter overall length, making it less susceptible to damage from impacts. This silencer also utilizes FMF's Factory Forward Engineering, positioning the muffler closer to the motor for improved mass centralization.
Constructed using only aerospace-grade materials that meet exacting specifications, this silencer is manufactured entirely at the FMF Southern California factory.
Key Features
- Resonance Chamber Technology™ for enhanced performance
- Reduced overall length to minimize crash damage risk
- Factory Forward Engineering for optimized mass centralization
- Built with aerospace-grade materials to precise standards
- Proudly manufactured in Southern California
- Designed for closed course use only
- Requires FMF header #041555 for proper fitment
Specifications
- Type: Slip-On
- Configuration: Single
- Construction Material: Aluminum
- Finish: Natural
- Midpipe Material: Stainless Steel
- Endcap Material: Carbon
- Spark Arrestor: Includes screen insert
- Quiet Insert: Includes 94 dB insert
- CARB Compliant: No
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.


