FMF Factory 4.1 Aluminum RCT Slip-On Muffler w/Carbon Tip (045558)
- FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage
- Spark Arrestor and Quiet Core 94db insert included
- Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire range of power
- RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output
- Compatible with stock header or FMF header
- Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws
- Meets AMA and FIM sound requirements
- Made in the U.S.A.
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 2014-2016 | Husqvarna | FE250 | |
| 2014-2016 | Husqvarna | FE350 | |
| 2007-2015 | KTM | 250 SXF | |
| 2007-2009 | KTM | 250 XC-F | |
| 2012-2015 | KTM | 250 XC-F | |
| 2008-2015 | KTM | 250 XCF-W | |
| 2011-2015 | KTM | 350 SXF | |
| 2012-2015 | KTM | 350 XC-F | |
| 2012-2015 | KTM | 350 XCF-W | |
| 2008 | KTM | 450 EXC-R | |
| 2007-2009 | KTM | 450 SMR | |
| 2007-2015 | KTM | 450 SXF | |
| 2012-2013 | KTM | 450 SXF Factory Edition | |
| 2007-2009 | KTM | 450 XC-F | |
| 2013-2015 | KTM | 450 XC-F | |
| 2009-2010 | KTM | 450 XC-W | |
| 2012-2016 | KTM | 450 XC-W | |
| 2012-2016 | KTM | 500 XC-W | |
| 2008 | KTM | 505 SXF | |
| 2008-2009 | KTM | 505 XC-F | |
| 2008 | KTM | 530 EXC-R | |
| 2007-2008 | KTM | 560 SMR | |