FMF Factory 4.1 RCT Slip-On Muffler - Kawasaki KX450F / KX450X - Anodized Titanium
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Fits: 2019–2021 Kawasaki KX450F, 2021 Kawasaki KX450X, 2022 Kawasaki KX450F
WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov
Features
- Incorporates FMF's Resonance Chamber Technology™ both internally and externally for maximum power gains across the full RPM range
- Shorter overall length reduces susceptibility to crash damage and centralizes mass closer to the motor (Factory Forward Engineering)
- Constructed entirely from aerospace-grade materials — manufactured 100% at FMF's Southern California factory
- Massive power gains throughout the RPM range with huge weight savings
- RTS (Rapid Tuning System) included
Specifications
| Type | Slip-On |
| Model | Factory 4.1 RCT |
| Pipe Material | Titanium |
| Muffler Material | Titanium |
| Muffler Finish | Anodized Blue |
| End Cap Material | Carbon Fiber |
| Unit | Each |
| Riding Style | Off-Road |
| Weight | 7.13 lbs |
| Dimensions | 23.94 x 12.17 x 5.47 in |
| Manufacturer SKU | 042371 |
Fitment
| Years | Make | Model |
|---|---|---|
| 2019–2022 | Kawasaki | KX450F |
| 2021 | Kawasaki | KX450X |
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
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