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FMF

FMF Factory 4.1 RCT Slip-On Exhaust Yamaha YZ450F / FX / WR450F 2018-2022

Item: P409518
17 Read 17 Reviews 17 Q&As Write a Review

If you are looking to drop weight, improve looks and most importantly improve your bikes power band then look no further. The FMF Factory 4.1 RCT Slip… Read More

$494.99$652.49
$549.99$724.99
Save up to $72.50 10%
Price depends on product options. Make a selection to update price.
Rebate Available! View Details

This product is vehicle specific.
Select a vehicle to ensure fitment.

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Product Details

This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

FMF Factory 4.1 RCT Slip-On Exhaust Yamaha YZ450F / FX / WR450F

If you are looking to drop weight, improve looks and most importantly improve your bikes power band then look no further. The FMF Factory 4.1 RCT Slip-On muffler was designed to bring out the hidden power potential in your machine by improving top-end pull and low-end torque. All 4.1 RCT mufflers are manufactured in FMF's Southern California factory using aerospace-grade materials that meet FMF's exacting specifications. A patented core shape enhances exhaust pressure for optimal power output while also lowering the sound level. 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 snap ring feature 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 trackside tuning
  • Removable spark arrestor included
  • Quiet insert sold separately
  • Can be used with FMF or stock OEM Header
  • 100% made in the USA

Weight:

  • Full Titanium 4.4 lbs
  • Titanium / Carbon end cap 4.3 lbs
  • Stainless Steel / Aluminum / Carbon end cap 5.2 lbs
Made in the USA
Product Style RevZilla Item # MFR. Product # Availability
Product Style Stainless Steel/Aluminum/Carbon Fiber RevZilla Item #1298077 MFR. Product #044443 AvailabilityOnly 3 Left: Ships within 24 hours
Product Style Titanium/Titanium/Titanium RevZilla Item #1298078 MFR. Product #044444/44444 AvailabilityOut of Stock
Product Style Titanium/Blue Titanium/Carbon Fiber RevZilla Item #1298079 MFR. Product #044445 AvailabilityIn Stock: Ships within 24 hours
This product is vehicle specific.
Select a vehicle to ensure fitment.
This Product Fits
Yamaha
WR450F 2019
YZ450F 2018, 2019, 2020, 2021, 2022
YZ450F Monster Energy Race Edition 2022
YZ450FX 2019, 2020
This item is also available for 132 different vehicles. View All Models
Gas Gas
EX 250F 2021-2022
EX 350F 2021-2022
EX 450F 2021-2022
MC 250F 2021-2022
MC 350F 2022
MC 450F 2021-2022
Honda
CRF110F 2019-2022
CRF125F 2019-2022
CRF125F (Big Wheel) 2019-2022
CRF250R 2011-2013
CRF250R 2014-2017
CRF250R 2018-2021
CRF250RX 2019-2021
CRF450R 2011-2012
CRF450R 2013-2016
CRF450R 2021-2022
CRF450R 2017-2018
CRF450R 2019-2020
CRF450R-S 2022
CRF450R Works Edition 2021-2022
CRF450RX 2021-2022
CRF450RX 2017-2018
CRF450RX 2019-2020
CRF450X 2005-2017
CRF450X 2019-2022
Grom MSX125 2014-2015
Husaberg
FE250 2013-2014
FE350 2013-2014
FE501 2013-2014
Husqvarna
FC250 2014-2015
FC250 2016-2017
FC250 2019-2022
FC350 2015
FC350 2016-2017
FC350 2019-2022
FC450 2014-2015
FC450 2016-2017
FC450 2018-2022
FC450 Rockstar Edition 2018-2021
FE250 2017-2019
FE250 2014-2016
FE350 2017-2019
FE350 2014-2016
FE450 2017-2019
FE450 2015-2016
FE501 2014-2016
FE501 2017-2019
FS450 2021-2022
FX350 2017-2018
FX350 2019-2022
FX450 2017-2018
FX450 2019-2022
TC449 2011-2013
KTM
250 EXC-F 2017-2019
250 SX-F 2016-2018
250 SX-F 2019-2022
250 SX-F 2009-2015
250 SX-F Factory Edition 2015-2017
250 SX-F Factory Edition 2021
250 XC-F 2016-2018
250 XC-F 2019-2022
250 XC-F 2009-2015
250 XCF-W 2009-2015
350 EXC-F 2017-2019
350 SX-F 2016-2018
350 SX-F 2019-2022
350 SX-F 2011-2015
350 XC-F 2016-2018
350 XC-F 2019-2022
350 XC-F 2011-2015
350 XC-F Kailub Russell 2021
350 XCF-W 2012-2016
400 XC-W 2009-2010
450 EXC 2009-2011
450 EXC-F Six Days 2017-2019
450 EXC-R 2008
450 SMR 2021-2022
450 SMR 2013
450 SX-F 2016-2018
450 SX-F 2019-2022
450 SX-F 2007-2015
450 SX-F Factory Edition 2015-2017
450 SX-F Factory Edition 2018-2021
450 SX-F Factory Edition 2012-2014
450 XC-F 2016-2018
450 XC-F 2019-2022
450 XC-F 2009-2015
450 XC-W 2009-2015
500 EXC 2017
500 EXC 2012-2016
500 EXC-F 2018-2019
500 XCF-W 2012-2014
500 XC-W 2013-2015
505 SX-F 2008
505 XC-F 2008-2009
530 EXC 2009-2011
530 EXC-R 2008
530 XC-W 2009-2010
Kawasaki
KLX140 2008-2020
KLX140G 2017-2020
KLX140L 2008-2020
KLX140R 2021-2022
KLX140R F 2021-2022
KLX140R L 2021-2022
KX250 2019-2020
KX250 2021-2022
KX250F 2009-2016
KX250F 2017-2018
KX250X 2021-2022
KX450 2019-2022
KX450F 2009-2011
KX450F 2012-2015
KX450F 2016-2017
KX450SR 2022
KX450X 2021-2022
Suzuki
RMZ250 2010-2012
RMZ250 2013-2018
RMZ250 2019-2022
RMZ450 2011-2017
RMZ450 2018-2022
Yamaha
WR250F 2020-2022
WR250F 2015-2019
WR450F 2016-2017
YZ250F 2010-2013
YZ250F 2019-2022
YZ250F 2014-2018
YZ250F Monster Energy Race Edition 2022
YZ250FX 2020
YZ250FX 2015-2019
YZ450F 2010-2013
YZ450F 2014-2017
YZ450FX 2016-2017
Product Description
Part Numbers
Fitment
17 Customer Reviews
17 5/5
17 Questions & 4 Answers
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