The FMF Factory 4.1 RCT slip-on is one of the most premium exhaust upgrades for modern 4-stroke enduro bikes. Built with a titanium body, carbon end cap, and FMF’s race-proven RCT design, it offers weight reduction, improved throttle response, and a deeper factory racing sound. Web sources confirm compatibility for KTM EXC-F, Husqvarna FE, and GasGas EC / ECF models from 2020–2023.
Features
- FMF Factory 4.1 RCT slip-on
- Titanium construction
- Carbon fiber end cap
- Reduced weight vs OEM
- Improved throttle response
- Deep racing sound
- Premium factory look
- Plug-and-play fitment
Compatible Bikes
KTM
250 EXC-F, 350 EXC-F, 450 EXC-F, 500 EXC-F (2020–2023)
Husqvarna
FE 250, FE 350, FE 450, FE 501 (2020–2023)
GasGas
ECF 250, ECF 350, ECF 450, ECF 500 (2021–2023)
For racing use only – not road legal. Use only on private property or closed tracks.
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