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.

![!Mini Powercore 4 DRZ70 08-10 Full System FMF []](https://boydsassets.specd.nz/uploads/2026/09/c654f9e8-fb17-42d0-a70c-07c936cef8b7-jpg.webp)
![!Mini Powercore 4 DRZ70 08-10 Full System FMF []](https://boydsassets.specd.nz/uploads/2026/09/a95484b9-eb65-43c8-97e4-6ac301224d79-jpg.webp)
![!Mini Powercore 4 DRZ70 08-10 Full System FMF []](https://boydsassets.specd.nz/uploads/2026/09/0b49c78a-f0d4-4f39-999d-6eddfa6318b1-jpg.webp)
![!Mini Powercore 4 DRZ70 08-10 Full System FMF []](https://boydsassets.specd.nz/uploads/2026/09/53bbb9b5-0a92-4552-b795-b6c08b7157a7-jpg.webp)
![!Mini Powercore 4 DRZ70 08-10 Full System FMF []](https://boydsassets.specd.nz/uploads/2026/09/d721b751-580c-46f6-8752-8435cc4000ae-jpg.webp)
![!Mini Powercore 4 DRZ70 08-10 Full System FMF []](https://boydsassets.specd.nz/uploads/2026/09/7378cbed-adbc-48d3-a47c-1bcf91fc31ad-jpg.webp)
![!Mini Powercore 4 DRZ70 08-10 Full System FMF []](https://boydsassets.specd.nz/uploads/2026/09/4d34a984-f78e-44b8-ab16-00cf5711379d-jpg.webp)




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