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Product Details
Product Description
Part Numbers
Fitment
FMF Factory 4.1 RCT Exhaust System KTM / Husqvarna 250cc-350cc
The FMF Factory 4.1 RCT full system is constructed from aerospace-grade materials that meet FMF's exacting specifications and is 100% manufactured in their Southern California factory. The patented MegaBomb header design allows exhaust gases to expand, cool and ramp back up at a higher velocity. This results in torque gains typically associated with longer headers, and the healthy over-rev of a short header. The muffler itself is shorter than OEM mufflers, making it less susceptible to crash damage and complements the centralized mass design by moving it closer to the motor. The rear end cap was engineered for fast and easy tuning by utilizing a retaining ring to keep the standard and optional inserts in place.
Features:
- Massive power gains throughout the RPM range
- Huge weight savings over stock exhaust
- RTS (Rapid Tuning System) for quick and easy track-side tuning
- Removable spark arrestor included
- Titanium or Stainless Steel SX MegaBomb Header
- Quiet insert included (94db)
- Meets AMA and FIM sound requirements
- 100% made in the USA
Weight:
- Titanium / Titanium / Carbon end cap 5.7 lbs
- Stainless Steel / Aluminum / Carbon end cap 6.9 lbs

Product Style | RevZilla Item # | MFR. Product # | Availability |
---|---|---|---|
Product Style Stainless Steel/Aluminum/Carbon Fiber | RevZilla Item #1179955 | MFR. Product #45613/045613 | AvailabilityIn Stock: Requires 1-2 business days of lead time prior to shipment |
Product Style Titanium/Blue Titanium/Carbon Fiber | RevZilla Item #1179943 | MFR. Product #045609/45609 | AvailabilityAvailable: Requires 3-5 business days of lead time prior to shipment |
This Product Fits
- KTM
- 250 SX-F 2016, 2017, 2018
- 250 SX-F Factory Edition 2015, 2016, 2017
- 250 XC-F 2016, 2017, 2018
- 350 SX-F 2016, 2017, 2018
- 350 XC-F 2016, 2017, 2018
This item is also available for 79 different bikes. View All Models
- Honda
- CRF150R 2007-2019
- CRF250R 2014-2017
- CRF250R 2018-2021
- CRF250RX 2019-2021
- CRF450R 2013-2014
- CRF450R 2015-2016
- CRF450R 2017-2018
- CRF450R 2019-2020
- CRF450RX 2017-2018
- CRF450RX 2019-2020
- Husaberg
- FE350 2013-2014
- Husqvarna
- FC250 2014-2015
- FC250 2019-2021
- FC350 2015
- FC350 2019-2021
- FC450 2014-2015
- FC450 2016-2018
- FC450 2019-2021
- FC450 Rockstar Edition 2018-2020
- FE250 2014-2015
- FE350 2014-2015
- FX350 2019-2021
- FX450 2017-2018
- FX450 2019-2021
- KTM
- 250 SX-F 2011-2012
- 250 SX-F 2013-2015
- 250 SX-F 2019-2021
- 250 XC-F 2013-2015
- 250 XC-F 2019-2021
- 250 XCF-W 2014-2016
- 350 EXC-F 2012-2015
- 350 SX-F 2011-2012
- 350 SX-F 2019-2021
- 350 XC-F 2011-2012
- 350 XC-F 2019-2021
- 350 XCF-W 2014-2016
- 350 XCF-W 2012-2013
- 450 SMR 2013
- 450 SX-F 2011-2012
- 450 SX-F 2013-2015
- 450 SX-F 2016-2018
- 450 SX-F 2019-2021
- 450 SX-F Factory Edition 2012-2014
- 450 SX-F Factory Edition 2015-2017
- 450 SX-F Factory Edition 2018
- 450 XC-F 2013-2015
- 450 XC-F 2016-2018
- 450 XC-F 2019-2021
- 450 XC-W 2012-2016
- 500 EXC 2012-2015
- 500 XCF-W 2012
- 500 XC-W 2013-2016
Product Description
Part Numbers
Fitment
3 Customer Reviews
5/5
14 Questions & 3 Answers