FMF Q4 S/A Silencer

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FMF Q4 S/A Silencer
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FMF Q4 S/A Silencer

Our Price: $260.96$332.99

MSRP: $319.99 - $379.99 - You save up to $59.03 (18% off)

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Additional Videos

FMF Factory | Inside Look

How To - Repack A Silencer For Your ATV Or Motorcycle

RM YouTube Channel

Details

    With FMF’s Hex Q4 S/A Silencer, you don’t have to choose between low sound and excellent power.

    FMF has always set itself apart by offering great options to lower your bike’s sound output. The Hex Q4 is no different. With a series of internal baffles, chambers, and sound-absorbing materials, FMF has created a silencer that accelerates exhaust flow while still keeping noise low. So low that most machines will come in well below 96 decibels with some models coming in as low as 92 decibels. While your sound is lowered you are still keeping all of your power, gaining significant weight savings over stock, and a USFS approved spark arrestor.

    So don’t compromise when you need to meet sound and safety regs. Pick up an FMF Hex Q4 S/A Silencer and ride wherever you want.

    Specs:
  • Meets USFS and FIM World Enduro sound regulations
  • No power loss in entire rpm range
  • USFS spark arrestor included
  • Weighs pounds less than stock
  • Rugged design thrives in off-road riding
  • Made in the USA
  • Can be used with stock or FMF header
  • Sound output under 96 dbs and may be as low as 92 dbs

FMF Q4 S/A Silencer Reviews

Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
 
4.5 / 5.0
63 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
44
12
5
1
1
Value
4.4 / 5
Durability
4.7 / 5
Ease of Installation
4.8 / 5
Fitment
4.8 / 5
Performance
4.9 / 5
Finish
4.9 / 5
Features
4.6 / 5
Recommend it?
Yes (18)
No (1)
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
4 / 5
Recommend it?
Yes
Fit perfect and sounds great
bought for a 2004 KLR 650, very happy with the performance increase, and sound. no regrets. Great quality and solid fit and install.

-m-2004 KAWASAKI KLR650--
May 22, 2018
Allenstown, NH, US
Age: 45-64
Purchased
9 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Fast service and great price
Love the sound and tone this gives my LTZ 400. Showed up fast and un damaged.
May 7, 2018
McMinnville, OR, US
Age: 25-44
Purchased
1 year ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
3 / 5
Fitment
4 / 5
Performance
5 / 5
Finish
5 / 5
Features
4 / 5
Recommend it?
Yes
More power, sounds great, would have liked a better clamp tor top of muffler, was hard to get it to get it on correctly.
April 27, 2018
Loganville, GA, US
Age: 45-64
Purchased
8 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
4 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Looks Great, Sounds Better.
Sounds awesome and looks great on my 450. Definitely the right decision for replacing the OEM muffler.

-m-2004 KTM 450 EXC 4-Stroke--
March 9, 2018
Union, KY, US
Age: 15-24
Purchased
3 months ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Value
4 / 5
Durability
4 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
4 / 5
Recommend it?
Yes
Good pipe!
Excellent fit and finish. Great install instructions. Thanks rocky mountain!

-m-2007 KTM 525 EXC 4-Stroke--
March 7, 2018
Delta, BC, CA
Age: 25-44
Purchased
2 months ago
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Never go wrong with fmf
Bought a complete system including fmf power bomb header my xr650l and xr600r perfect fit and great sound on both bikes, rejetted as expected. Sounds great without being too loud.

-m-2016 HONDA XR650L--
January 16, 2018
Needles, CA, US
Age: 25-44
Gender:
Male
Weight:
191 - 220 lbs.
Value
3 / 5
Durability
3 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
3 / 5
Recommend it?
Yes
FMF Q4
Easy to install. More responsive and great sounding without being too loud.

-m-2017 YAMAHA TTR230--
January 2, 2018
Porterville, CA, US
Age: 15-24
Purchased
5 months ago
Gender:
Male
Weight:
101 - 130 lbs.
Height:
5'1 - 5'3
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Sounds amazing
Looks and sounds amazing. Fits perfectly and did I say sounds amazing!

-m-2016 SUZUKI DR-Z 400SM--
January 2, 2018
Orland , CA, US
Age: 25-44
Gender:
Male
Weight:
251 - 280 lbs.
Height:
6'1 - 6'3
Value
4 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
4 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Best pipe i have had on my XR650L
i have had several pipes on my 97 XR650L and i like the FMF Q4 the most. it sounds great and has a nice bark to it wile not being obnoxious all the time. it fits perfect, was easy to install and has held up to several thousand miles of street riding and many many hours of HARD offroading.

-m-1997 HONDA XR650L--
December 7, 2017
Pittsboro, NC, US
Age: 25-44
Purchased
1 year ago
Gender:
Male
Weight:
221 - 250 lbs.
Height:
5'10 - 6'0
Value
4 / 5
Durability
4 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Nice muffler
Bought this since i wanted the "more quiet" pipe.. Ha, its still loud but if you put the spark arrestor in place it isn't too bad, nice sounding muffler though. Easy to install, great instructions.. Good performance! Solid purchase..

-m-2012 SUZUKI DR-Z 400S--
October 28, 2017
Gtown, TX, US
Age: 45-64
Purchased
7 months ago
Gender:
Male
Each question or answer submitted enters you into a:
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 7 questions Browse 7 questions and 34 answers
is this Q4 muffler 100% chambered and mechanical? or does it still have packing in it? i would prefer not to have to re-pack it.
craig d on Dec 7, 2016
BEST ANSWER: No, it DOES have packing in it. It is not made like an OEM silencer that doesn't require re-packing. I have been very happy with the performance of the Q4 though. It goes a very long time between re-packs. Much longer than the two-stroke version
Does this exhaust have a spark arester and does any one have it on a 2003 ltz suzuki 400?
A shopper on Mar 29, 2017
BEST ANSWER: I know that it is compliant with the forestry service because it has a sticker on it saying so. So yes, this has a spark arrest. I have a DRZ400 and it works perfect but I cannot comment on the LTZ.
Do I need to buy a jet kit to add this q4 to my 05 yfz450?
A shopper on Jul 25, 2017
BEST ANSWER: If you are coming from a stock exhaust I would. Don't want to be lean. Increased flow doesn't do any good if it doesn't get the corresponding fuel to burn and cool. Check forums for proper jet numbers for your setup. Likely just need a new main jet
What jets are needed for Miami fl / also all I do is slide it on and bolt it?
A shopper on Jan 22, 2018
BEST ANSWER: To get full benefit of this muffler I would also use the power bomb header pipe. JD jetting make jet kits for many models that will give you excellent results,with directions and recommendations for different altitudes.they also make recommendations with or without header..... Braap
Is this exhaust a Q4 or the older Q2? Not sure if part got updated for 2001 WR426?
Joshua C on Nov 21, 2017
BEST ANSWER: This is the new Q4 and I installed on a 2015 WR450. As for outfitting your 2001 you might want to call FMF direct before ordering on Rocky Mountain
FMF (website) states the Q4 will fit on a 2009 Honda CRF250R but not a 2010. Has anyone tried, or know, if a Q4 will fit a 2010 Honda CRF250R?
Stuart K on Apr 4, 2018
BEST ANSWER: Yes , look up part number, FMF make many applications
This is a great exhaust
Make sure you get the front pipe first!!
Rip it up!
I currently have this FMF Q4 on my bike that I am selling. It doesn’t fit my new bikes header so I am wondering that if I order a Powerbomb header, this muffler will fit?
Mitchell F on May 20, 2018
BEST ANSWER: The Q4 fits perfectly with the Powerbomb header. Just be sure we're talking the same model bike because the mufflers are bike specific. I'm guessing you know that but for future readers...
Powerbomb does not come with a heat shield or mounts for one.
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