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 Blue Anodized Titanium 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 specifically to our standards.
Item ID:045561
Type:Slip-On
Configuration:Single
Const:Titanium
Finish:Blue Anodized
Midpipe:Titanium
Endcap:Carbon
Spark Arrestor:Screen Insert (included)
Carb Warning:no
Quiet Insert:94dB Insert (included)
Weight:4 lbs.
*****************
Sound levels at idle speed tested at 1' above and 1' behind each
muffler on the same 21' 500 EXCF tested back to back.
Stock muffler 82
Stock w Pro Moto end cap / ultra silent insert 85
Stock w Pro Moto end cap / silent insert 86
Stock w Pro Moto end cap 88
Graves Motorsports w db killer 85
Graves Motorsports 89
Fmf q4 84
Fmf 4.1 88
Fmf power core 88
Lexx w db killer 86
Lexx w spark arrestor insert 87
Lexx 89
Akropovic 85
FITMENT:
045648
| GAS GAS | EC 250F | 21+ |
| GAS GAS | EC 350F | 21+ |
| HUSQVARNA | FE 250 | 20+ |
| HUSQVARNA | FE 350 | 20+ |
| HUSQVARNA | FE 350 ROCKSTAR EDITION | 21+ |
| HUSQVARNA | FE 450 | 20+ |
| HUSQVARNA | FE 501 | 20+ |
| KTM | 350 XCF-W | 20+ |
| KTM | 450 XCF-W | 20+ |
| KTM | 500 XCF-W | 20+ |
045586
| Make | Model | Year |
|---|---|---|
| HUSQVARNA | FC 250 | 16-18 |
| HUSQVARNA | FC 350 | 16-18 |
| HUSQVARNA | FC 450 | 16-18 |
| HUSQVARNA | FE 250 | 17-19 |
| HUSQVARNA | FE 350 | 17-19 |
| HUSQVARNA | FE 450 | 17-19 |
| HUSQVARNA | FE501 | 17-19 |
| HUSQVARNA | FX 350 | 17-18 |
| HUSQVARNA | FX 450 | 17-18 |
| KTM | 250 EXC-F | 17-19 |
| KTM | 250 SX-F | 16-18 |
| KTM | 250 SX-F FACTORY EDITION | 15-17 |
| KTM | 250 XC-F | 16-18 |
| KTM | 350 EXC-F | 17-19 |
| KTM | 350 SX-F | 16-18 |
| KTM | 350 XC-F | 16-18 |
| KTM | 450 EXC-F | 18-19 |
| KTM | 450 EXC-F SIX DAYS | 17-19 |
| KTM | 450 SX-F | 16-18 |
| KTM | 450 SX-F FACTORY EDITION | 15-17 |
| KTM |
450 XC-F |
16-18 |
KTM 500 EXC-F 17-19
045561
2015-2016 Husqvarna FE 450
2014-2016 Husqvarna FE 250
2014-2016 Husqvarna FE 350
2013-2016 KTM 500 XC-W
2013-2014 Husaberg FE 350
2013-2014 Husaberg FE 250
2013-2014 Husaberg FE 501
2013 KTM 450 SMR
2012-2016 KTM 350 XCF-W
2012-2016 KTM 500 EXC
2012-2014 KTM 450 SX-F FE
2012-2014 KTM 500 XCF-W
2011-2015 KTM 350 SX-F
2011-2015 KTM 350 XC-F
2009-2016 KTM 250 XCF-W
2009-2015 KTM 250 SX-F
2009-2011 KTM 530 EXC
2009-2011 KTM 450 EXC
2009-2010, 2012-2016 KTM 450 XC-W
2009-2010 KTM 530 XC-W
2009-2010 KTM 400 XC-W
2009, 2013-2015 KTM 450 XC-F
2009, 2011, 2013-2015 KTM 250 XC-F
2008-2009 KTM 505 XC-F
2008 KTM 450 XCR-W
2008 KTM 530 XCR-W
2008 KTM 530 EXC-R
2008 KTM 450 EXC-R
2008 KTM 505 SX-F
2007-2015 KTM 450 SX-F