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FMF
4.1 RCT Exhaust with MegaBomb - Aluminum
Part # 1820-1931
$1,074.99
Low Stock (3)
- 60-day returns
- Free shipping over $100
- Secure checkout
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Confirmed fit for 8 motorcycle configurations across Yamaha, model years 2019–2023.
| Years | Make & Model |
|---|---|
| 2019-2023 Yamaha | YZ450FX |
| 2020-2022 Yamaha | YZ450F |
- The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology™ both internally and externally
- Shorter overall length that is less susceptible to crash damage and complementary to FMF's Factory Forward Engineering - moving the muffler closer to the motor to centralize mass
- The Factory 4.1 RCT is constructed from only aerospace grade materials that meet FMF's exacting specifications and is manufactured 100% at their Southern California factory
- Massive Power gains throughout the RPM range.
- Huge weight savings
- New RTS (Rapid Tuning System)
- Includes MegaBomb header
- Includes spark arrestor screen insert
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Overview
The FMF 1820-1931: 4.1 RCT Exhaust with MegaBomb - Aluminum. Confirmed fit for 8 motorcycle configurations across Yamaha, model years 2019–2023. Ships from Greasemoto — a veteran-owned motorcycle parts shop in Fort Worth, TX — with free U.S. shipping on orders over $100.
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