

Its compact, lightweight design, which complies with AMA/FIM standards, centralizes weight and improves handling, while the RTS system facilitates adjustment.
FMF offers you the high-performance Factory 4.1 RCT Slip-On silencer, specially designed for HONDA motocross bikes. This model features a compact architecture with reduced overall length, minimizing the risk of damage in the event of a fall or impact. Thanks to its advanced design, it offers considerable power gains across the entire rev range, improving engine responsiveness and racing performance. Manufactured from aerospace-grade materials, the Factory 4.1 RCT guarantees a significant weight reduction compared to original systems, contributing to better handling and sharper acceleration. The RTS (Rapid Tuning System) allows quick and precise adjustment of the silencer to suit race conditions or rider preferences, without complex disassembly. Ideal for demanding riders, this muffler combines robustness, innovation and efficiency, while complying with AMA/FIM noise standards. A strategic choice for optimizing your HONDA motocross bike.
Fits on
HONDA CRF 450 X 2025
HONDA CRF 450 X 2024
HONDA CRF 450 X 2023
HONDA CRF 450 X 2022
HONDA CRF 450 X 2021
HONDA CRF 450 X 2020
HONDA CRF 450 X 2019
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