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.

![Powercore 4 KLX110/L S/A 02-23 DRZ110 FMF 1 piece exhaust [A]](https://boydsassets.specd.nz/uploads/2026/08/6976fcc9-cf1b-408f-ac00-f0b4e1680474-jpg.webp)
![Powercore 4 KLX110/L S/A 02-23 DRZ110 FMF 1 piece exhaust [A]](https://boydsassets.specd.nz/uploads/2026/08/05e904e2-40a8-463b-b0cf-192b8b3b8c3a-jpg.webp)
![Powercore 4 KLX110/L S/A 02-23 DRZ110 FMF 1 piece exhaust [A]](https://boydsassets.specd.nz/uploads/2026/08/ba241433-813b-45d6-8e7a-2a4da019e66e-jpg.webp)




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