FMF Factory 4.1 Slip-On Exhaust KTM/HUS/GAS 350/450 (’19-’22) | 045629
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 FMF 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 FMF’s Southern California factory.
- All new incorporating the latest in Resonance Chamber Technology
- Patented core shape lowers sound level while maintaining maximum power output
- Patented canister shape increases internal volume for more sound absorbing material
- Patented chamber design to enhance and refine exhaust pressure
- Factory Forward Engineering centralizes mass and is less prone to crash damage
- Tuned exhaust with optimized core specifications for each application
- Innovative rear end cap for simple installation of tuning tip inserts or spark arrestor
- Titanium mid-pipe for extreme light weight
Fitment:
| Make | Model | Year |
|---|---|---|
| GAS GAS | EX350F | 21-22 |
| GAS GAS | EX450F | 21-22 |
| GAS GAS | MC350F | 23 |
| GAS GAS | MC450F | 21-23 |
| HUSQVARNA | FC350 | 19-22 |
| HUSQVARNA | FC450 | 19-22 |
| HUSQVARNA | FC450 ROCKSTAR EDITION | 18-21 |
| HUSQVARNA | FX350 | 19-22 |
| HUSQVARNA | FX450 | 19-22 |
| KTM | 350 SX-F | 19-22 |
| KTM | 350 XC-F | 19-22 |
| KTM | 350 XC-F KAILUB RUSSELL | 21 |
| KTM | 450 SX-F | 19-22 |
| KTM | 450 SX-F FACTORY EDITION | 18-21 |
| KTM | 450 XC-F | 19-22 |
