Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 4 - Jul 9
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For Your Every Summer RSVP, with Code: SUMMER15
Description
FMF Racing Honda CRF450X / RX 21-26 SS Alum Factory 4.1 RCT SO Muffler w/ R. Carbon CapExperience next level performance and sound with the FMF 4 Stroke Factory 4. 1 RCT Muffler, engineered specifically for Honda CRF450X and RX models from 2021 to 2024. Constructed from high quality stainless steel with an aluminum shell for lightweight durability, this muffler features FMF's renowned RCT (Recomp Chamber Technology) which delivers a deep, aggressive tone without sacrificing power and throttle response. The Factory 4. 1 enhances your
Experience next-level performance and sound with the FMF 4-Stroke Factory 4.1 RCT Muffler, engineered specifically for Honda CRF450X and RX models from 2021 to 2024. Constructed from high-quality stainless steel with an aluminum shell for lightweight durability, this muffler features FMF's renowned RCT (Recomp Chamber Technology) which delivers a deep, aggressive tone without sacrificing power and throttle response.The Factory 4.1 enhances your bike's overall efficiency, reduces weight, and stands up to the rigors of both trail and race conditions. The inclusion of a reinforced carbon fiber end cap not only adds to the muffler's sleek styling but also minimizes heat transfer, protecting both rider and bike.
Installation is straightforward with a slip-on design that bolts directly on, making it an ideal upgrade for riders looking to boost performance and sound with minimal hassle. Whether you are hitting the trails or tuning your bike for competition, the FMF Factory 4.1 RCT Muffler offers a perfect combination of power, durability, and style for your CRF450X or RX.
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
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.5 ★★★★★
Based on 2384 reviews
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Product Reviews
★★★★★ 1
Doesn’t Cut Steel Belts in Tires
Size: CB-M03H
Doesn’t cut steel belts in tires to facilitate repair.
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Reviewed in the United States on May 5, 2025
★★★★★ 5
Pattern and roughness appropriate but still need to test
I haven't had a flat tire yet, so I also haven't had occasion to test these but they seem like great value for an extremely low price (especially versus a new tire.) I have handled them to try and gauge how quickly they'd smooth a hole, and they're rough / sharp and aggressive enough that I expect them to work quickly and well on not only tires, but on a variety of other materials. This pattern in particular should allow material to be shed and then passed backward pretty easily without clogging things up or slowing them down. If you've bothered to buy a patch kit for your tires, you really ought to have one of these around.
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Reviewed in the United States on January 18, 2026
★★★★★ 5
Thank you!
Size: 1/4-Inch - With Adapter
Thank you!
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Reviewed in the United States on April 27, 2023
★★★★★ 5
Makes plugging easy
Size: 1/4-Inch - With Adapter
Screw that T handle punch tool!!
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Reviewed in the United States on April 4, 2021
★★★★★ 5
as advertised
As advertised
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Reviewed in the United States on June 2, 2026