Description

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our 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 our exacting specifications and is manufactured 100% at our Southern California factory.
- Available in Natural Aluminum Muffler with Carbon End Cap
- Massive Power gains throughout the RPM range.
- Huge weight savings
- New RTS (Rapid Tuning System)
- FMF uses the highest quality proprietary blend of alloy grade titanium made especially to our standards.

![ILtd Edition 4.1 RCT Ti 450SXF 15-18 Anod w/Ti M-Bomb Heade[]](https://boydsassets.specd.nz/uploads/2026/09/542acd08-ba7c-4d69-8d9d-715a527d351e-jpg.webp)
![ILtd Edition 4.1 RCT Ti 450SXF 15-18 Anod w/Ti M-Bomb Heade[]](https://boydsassets.specd.nz/uploads/2026/09/165e3177-8ef5-49dc-89eb-1f0e445fb3d4-jpg.webp)
![ILtd Edition 4.1 RCT Ti 450SXF 15-18 Anod w/Ti M-Bomb Heade[]](https://boydsassets.specd.nz/uploads/2026/09/1de4fab5-ac9b-4871-b788-4f9bb991f364-jpg.webp)
![ILtd Edition 4.1 RCT Ti 450SXF 15-18 Anod w/Ti M-Bomb Heade[]](https://boydsassets.specd.nz/uploads/2026/09/8a32cf7d-0ef1-4b57-9cd1-f3c1c36364c7-jpg.webp)
![ILtd Edition 4.1 RCT Ti 450SXF 15-18 Anod w/Ti M-Bomb Heade[]](https://boydsassets.specd.nz/uploads/2026/09/45169141-7d4f-498e-aa00-e2868cadec6e-jpg.webp)




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