FMF Factory 4.1 RCT Titanium Slip-On - Yamaha YZ450F / YZ450FX 2018-2026
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- 30-day hassle-free returns
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Take your four-stroke to the next level with the FMF Factory 4.1 RCT Titanium Slip-On. Built around FMF's Resonance Chamber Technology, the 4.1 RCT is engineered to deliver serious power gains while keeping sound levels in check, making it one of the most popular race exhausts in the paddock.
The titanium canister and titanium mid-pipe shave weight compared to stock, and FMF's Factory Forward design pulls the muffler closer to the center of the bike for better mass centralization and less exposure to crash damage. Each application is tuned with its own core specification, so you get power that is matched to your machine instead of a one-size-fits-all pipe. The innovative rear end cap makes it simple to swap tuning tip inserts or install the included spark arrestor for trail riding.
β Fits
- 2018-2019 Yamaha YZ450F
- 2020-2022 Yamaha YZ450F
- 2023-2025 Yamaha YZ450F
- 2026 Yamaha YZ450F
- 2019-2022 Yamaha YZ450FX
- 2023-2025 Yamaha YZ450FX
β Features
- Resonance Chamber Technology (RCT) for more power with lower sound
- Patented core and canister shape for more sound-absorbing volume
- Titanium canister and titanium mid-pipe
- Factory Forward design centralizes mass and resists crash damage
- Application-specific core tuning
- Rear end cap accepts tuning tip inserts or spark arrestor
- Carbon fiber end cap
- For closed-course competition use only
β What's Included
- (1) FMF Factory 4.1 RCT titanium slip-on muffler with mid-pipe
- Spark arrestor insert and wash plug
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π¦ Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
