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FMF Q4 HEX S/A Slip-On Exhaust Yamaha YZ450F / FX / WR450F

Loud pipes might save lives on the street but in the dirt sound is the number one killer of riding trails and regulated track hours. If you have been searching for a performance enhancing muffler that does not wake the dead, then the FMF Q4 HEX is the muffler for you. FMF approached the design process of the Q4 HEX with the goal of achieving more power, while keeping noise levels to a minimum. After countless hours of testing, FMF proved you don't have to settle for a plugged up, horsepower-robbing moto muffler to remain sound compliant.

Features:

  • Less sound equals more ground (helps keep our riding areas open)
  • Meets USFS and FIM World Enduro sound regulations
  • Power gains throughout the entire RPM range
  • Spark arrestor included
  • Pounds lighter than stock
  • Rugged design for off-road endurance
  • Only US manufacturer to offer dedicated quiet exhaust systems
  • Can be used with stock or FMF Header
  • Weight: 6.1 lbs
  • 100% Made in the USA

Note: Image is for reference only. Actual slip-on muffler / mid-pipe will vary. 

Made in the USA
Product Style RevZilla Item # Store Sku MFR. Product # Availability
Product Style Stainless Steel/Aluminum/Stainless Steel RevZilla Item #1298183 Store Sku MFR. Product #044442 AvailabilityIn Stock: Ships within 24 hours

This product DOES NOT FIT your 2021 Can-Am Outlander 570 XMR

This Product Fits
Yamaha
WR450F 2019
YZ450F 2018-2025
YZ450F 50th Anniversary Edition 2024
YZ450F Monster Energy Race Edition 2022, 2023, 2024, 2025
YZ450FX 2019-2026
This item is also available for 115 different vehicles. View All Models
Beta
350 RR 2020-2025
350 RR Race 2025
350 RR Race Edition 2021-2025
350 RR X-Pro 2025
390 RR 2023-2025
390 RR Race 2025
390 RR Race Edition 2020-2025
390 RR X-Pro 2025
430 RR 2023-2025
430 RR Race 2025
430 RR Race Edition 2020-2025
430 RR X-Pro 2025
480 RR 2023-2025
480 RR Race 2025
480 RR Race Edition 2020-2025
480 RR X-Pro 2025
Gas Gas
EX 250F 2021-2023
EX 350F 2021-2023
EX 450F 2021-2023
MC 250F 2021-2023
MC 350F 2022-2023
MC 450F 2021-2023
Honda
CRF250R 2025-2026
CRF250RX 2025-2026
Husaberg
FE250 2013-2014
FE350 2013-2014
FE501 2013-2014
Husqvarna
FC250 2016-2018
FC250 2019-2022
FC350 2016-2017
FC350 2019-2022
FC450 2016-2017
FC450 2019-2022
FC450 Rockstar Edition 2018-2021
FE250 2017-2019
FE250 2020
FE250 2014-2016
FE350 2017-2019
FE350 2020-2022
FE350 2014-2016
FE450 2017-2019
FE450 2023
FE450 2015-2016
FE501 2017-2019
FE501 2020-2022
FS450 2021-2022
FX350 2017-2018
FX350 2019-2022
FX450 2017-2018
FX450 2019-2022
KTM
250 SX-F 2016-2018
250 SX-F 2009-2015
250 SX-F Factory Edition 2015-2017
250 XC-F 2016-2018
250 XC-F 2019-2022
250 XC-F 2009-2015
250 XCF-W 2009-2016
350 EXC-F 2017
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 2020-2022
350 XCF-W 2012-2016
400 XC-W 2009-2010
450 EXC 2009-2011
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 2016-2017
450 XC-F 2019-2022
450 XC-F 2009-2015
450 XCF-W 2023
450 XCR-W 2008
450 XC-W 2009-2016
450 XC-W Six Days 2010-2011
500 XCF-W 2020-2022
500 XCF-W 2012-2014
500 XC-W 2013-2016
505 SX-F 2008
505 XC-F 2008-2009
530 EXC 2009-2011
530 EXC-R 2008
530 XCR-W 2008
530 XC-W 2009-2010
Kawasaki
KLX300R 2020-2021
KX250 2021-2024
KX250 2025-2026
KX250X 2021-2024
KX250X 2025-2026
KX450 2024-2026
KX450 2019-2023
KX450 50th Anniversary Edition 2024
KX450SR 2022-2026
KX450X 2021-2023
Triumph
TF450C 2026
TF450E 2026
TF450RC Edition 2025
Yamaha
WR250F 2021-2023
WR250F 2015-2019
YZ250F 2014-2018
YZ250F 2019-2026
YZ250F 70th Anniversary Edition 2026
YZ250F Monster Energy Race Edition 2022-2023
YZ250FX 2015-2019
YZ250FX 2020-2025
Product Description
Part Numbers
Fitment
26 Customer Reviews
26 4.5/5
13 Questions & 7 Answers
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