END OF LINE Factory 4.1 RCT Exhaust Silencer 11-12 Yamaha YZ 450 F - FMF 044371
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 18+, T&Cs apply
FMF Factory 4.1 RCT Exhaust Silencer 044371. Incorporates Resonance Chamber Technology. Patented core shape lowers sound level while maintaining maximum power output. Patented canister shape increases internal volume for more sound absorbing material. Patented chamber design to enhance and refine exhaust pressure. Factory Forward Engineering centralizes mass and is less prone to crash damage. Tuned exhaust with optimized core specifications for each application. Meets AMA and FIM sound requirements. Spark arrestor included in muffler. Built 100% in the U.S.A. Maintenance made easy with the removal of 4 screws on the front end cap. Compatible with stock or FMF header. For Closed Course Competition Use Only.
- SKU
- 06-1756.FMF.FTN
- Brand
- FMF Exhausts
- Availability
- In Stock (2)
Fitments (6)
| Make | Model | Year |
|---|---|---|
| YAMAHA | YZ 450F | 2011 |
| YAMAHA | YZ 450F | 2012 |
| YAMAHA | YZ 450F | 2013 |
| YAMAHA | YZF 450 | 2011 |
| YAMAHA | YZF 450 | 2012 |
| YAMAHA | YZF 450 | 2013 |
- General Product Group
- Exhaust Systems & Parts
- General Product Type
- Silencer
- Variant Id
- 209322
FULL DESCRIPTION
FMF Factory 4.1 RCT Exhaust Silencer
Enhance your motorcycle's performance and sound with the FMF Factory 4.1 RCT Exhaust Silencer. This high-quality silencer is engineered for optimal power output and a refined exhaust note.
Key Features:
- Incorporates Resonance Chamber Technology for improved performance.
- Patented core shape effectively lowers sound levels without sacrificing maximum power.
- Patented canister shape increases internal volume, allowing for more sound-absorbing material.
- Features a patented chamber design to enhance and refine exhaust pressure.
- Factory Forward Engineering centralizes mass, making the silencer less prone to damage in the event of a crash.
- Tuned exhaust with optimized core specifications tailored for specific applications.
- Delivers the renowned quality, craftsmanship, and performance expected from FMF.
- Meets AMA and FIM sound requirements.
- Spark arrestor is included in the muffler.
- Proudly built 100% in the U.S.A. at FMF's state-of-the-art factory.
- Easy maintenance with the removal of just 4 screws on the front end cap.
- Compatible with both stock and FMF headers.
- Notice: For Closed Course Competition Use Only.
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.


