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Description
FMF Factory 4.1 RCT Muffler - Aluminum YZ250F 2019-2024 044453 1821-1883The Factory 4. 1 RCT incorporates FMF's Resonance Chamber Technology both internally and externally In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering moving the muffler closer to the motor to centralize mass The Factory 4. 1 RCT is constructed from only aerospace grade materials that meet their exacting specifications and is manufactured 100% at their
- The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology™ both internally and externally
- In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering - moving the muffler closer to the motor to centralize mass
- The Factory 4.1 RCT is constructed from only aerospace grade materials that meet their exacting specifications and is manufactured 100% at their Southern California factory
- Massive Power gains throughout the RPM range.
- Huge weight savings
- RTS (Rapid Tuning System)
| Make | Model | Year |
|---|---|---|
| YAMAHA | YZ250F | 19-24 |
| YAMAHA | YZ250FX | 20-24 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
10 foot long
Size: 16AWG -10FT 2Pin DT
Worked great. Plugged in with no problem.
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Affordable
Size: 16AWG -10FT 2Pin DT
Used them to install Morimoto 2 Banger pods on my vehicle. Casing for the wires is thick enough that will stand the weather and abrasion. I spliced them to make just one run, added braided sleeving (for looks and additional protection). The wire quality and thickness made the connection with waterproof connectors strong and durable. Saved me around 20 dollars as compared to brand name wires.
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Reviewed in the United States on October 24, 2024
★★★★★ 5
Perfectos
Size: 16AWG -10FT 2Pin DT
Exelente
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Reviewed in the United States on December 29, 2025
★★★★★ 4
2021 JL Jeep
Size: 16AWG -10FT 2Pin DT
I used these to plug in my mopar lights for my wrangler. Matched right up to the factory plugs.
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Reviewed in the United States on March 19, 2025
★★★★★ 5
Don’t hesitate
Size: 16AWG -10FT 2Pin DT, Size: 16AWG -10FT 2Pin DT
These harness extenders are great quality for the price. Don’t go with any other brand but this one 10/10
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Reviewed in the United States on October 2, 2025