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FMF Q4 Spark Arrestor Slip-On Exhaust
FMF Q4 Spark Arrestor Slip-On Exhaust

$287.99 - $350.99
10% Off - Save up to $39.00
4.55 5 38
Rating: 4.6 out of 5 stars

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      Item #FMF001G

      38 Reviews

      4.6 out of 5 stars
      •   26 reviews
      •   10 reviews
      •   0 reviews
      •   1 reviews
      •   1 reviews

      All Reviews

      Tin Man

      Verified Purchaser
      1 month 13 days ago Carmel Valley CA
      5 out of 5 stars
      Durability
      5/5
      Ease of Installation
      4/5
      Performance
      5/5
      Power
      5/5
      Style
      5/5
      Very Happy

      Fit was perfect with no modifications. Performance is awesome it really helped open to open up the power on my CRF 250x along with a JD jet kit and air box modification.

      AtomicClox

      Verified Purchaser
      Over 5 months ago
      4 out of 5 stars
      Ease of Installation
      4/5
      Performance
      5/5
      Power
      5/5
      Style
      5/5
      Works well, sounds great

      Slip on, but the factory clamp does NOT work. I used a hose clamp and it worked. Good sound, and added power.

      Dirtridder

      Verified Purchaser
      Over 7 months ago Northern Michigan
      5 out of 5 stars
      Durability
      5/5
      Ease of Installation
      5/5
      Performance
      5/5
      Power
      5/5
      Style
      5/5
      Love the sound and the increased power!

      4#s lighter than stock and looks Great on the bike.

      Jeremeycash

      Over 8 months ago Missouri
      4 out of 5 stars
      Durability
      4/5
      Ease of Installation
      3/5
      Performance
      4/5
      Power
      4/5
      Style
      4/5
      Sound good

      Love the sound
      Came with the wrong size bolt for 2017 wr250r.
      By the rear foot peg is the missing bolt..

      Osamu

      Verified Purchaser
      Over 9 months ago
      5 out of 5 stars
      Durability
      5/5
      Ease of Installation
      5/5
      Performance
      5/5
      Power
      5/5
      Style
      5/5
      Cool

      Happy

      TrainWreck

      Verified Purchaser
      Over 11 months ago Ventura Ca.
      5 out of 5 stars
      Durability
      5/5
      Ease of Installation
      5/5
      Performance
      5/5
      Power
      5/5
      Style
      5/5
      Easy installation nothing to modify

      I put the pipe on my 2018 WR250R about a month ago, really easy to install, It bolted right up , the bike has more power than it had with stock pipe , Well worth the investment

      Bossmoss650L01yz250

      1 year ago Spokane wa
      5 out of 5 stars
      Durability
      4/5
      Ease of Installation
      3/5
      Performance
      5/5
      Power
      5/5
      Style
      5/5
      Great slip on!

      I put this on my 2000 xr650l in June 2018. 6 months and 3000 miles later I am very pleased with this unit! I left the stock header pipe and added the Q4. The difference in the sound compared to the stock muffler is big! I love the way my xr
      literally barks now! Not as quiet as advertised. Doesn't bother me.
      I did bash it on a rock one day when I crashed on some single track trails. It's pretty tough so I can attest it's pretty sturdy. Just a scratch.
      Buy it for your xr!!

      Braap

      Verified Purchaser
      1 year 1 month ago White Lake MI
      4 out of 5 stars
      Durability
      3/5
      Ease of Installation
      3/5
      Performance
      3/5
      Power
      1/5
      Style
      2/5
      Nice muffler

      Bought the fmf q4 for a 2014 wr250r. Wakes the bike up nicely!

      Hoss

      1 year 2 months ago Eugene or
      5 out of 5 stars
      Durability
      5/5
      Ease of Installation
      4/5
      Performance
      5/5
      Power
      5/5
      Style
      5/5
      Looks great!

      The price was a bit crazy in my opinion $350 but other than that I have put around 500 miles on the fmf q4 so far on my 1998 klr 650 and I love the look of it, the sound is just right and it feels like the bike has a bit more power too! I'm glad I got the fmf q4 muffler.

      Gj_brit

      Verified Purchaser
      1 year 7 months ago Wa
      5 out of 5 stars
      Durability
      5/5
      Ease of Installation
      5/5
      Performance
      5/5
      Power
      4/5
      Style
      5/5
      FMF Q4 Exhaust for HondaXR650L

      Pipe fit great with no issues. Sounds great. Louder Han stock but not too loud. Also install the FMF joe-jet kit so not running lean

      21 Questions

      • Answered:   20
      • Not Yet:   1

      Question asked by Chad L

      Question: Will this fit a Honda trx 400ex
      Question asked 1 month ago
      Question answered by Paul
      User's contributor status: Top 1
      Question answered 1 month ago
      Answer: Yes, the FMF Q4 Spark Arrestor Slip-On Exhaust is available to fit the 1999 to 2008 Honda TRX400EX.

      Question asked by SerpentZA

      Question: I need a quiet insert but I can't find the part, I bought a bike with a Q4 on it but it's way too loud as the spark arrestor insert has been removed, I've got neighbours throwing bricks at me to shut me up, please help!
      Question asked Over 10 months ago
      Question answered by JamesGearhead
      User's contributor status: Top 10
      Question answered Over 10 months ago
      Answer: FMF HEX Q4 Quiet Core Spark Arrestor Insert (part number 040671) is a replacement that will most likely help you out the most. That should really quiet up the motorcycle, and make the angry brick throwing neighbors chill out!

      Question asked by cole

      Question: How does this seal up to the powerbomb header for my 2004 crf250r? Is it a gasket or silicone
      Question asked Over 11 months ago
      Question answered by robert
      User's contributor status: Top 10
      Question answered Over 11 months ago
      Answer: Their should be a muffler connection gasket to seal the two.

      Question asked by Gabe257

      Question: I have a 1998 honda xr250r. The guy who had the bike before me deleted the diffuser. Wanted a quiet exaust and not too worried about power loss. Is this a good muffler for me or what do yall reccomend
      Question asked Over 12 months ago
      Question answered by Isaac
      User's contributor status: Top 10
      Question answered Over 12 months ago
      Answer: That model would be the quietest muffler we offer for your model.

      Question asked by merrick

      Question: What kind of jet kit would be recommended for this exhaust for my 2006 Suzuki LTZ 250 
      Question asked 1 year 4 months ago
      Question answered by TiaGearhead
      User's contributor status: Top 25
      Question answered 1 year 4 months ago
      Answer: You will need to contact your local mechanic since jetting is based off of location and what the bike is lacking. Here is a jet kit we do offer for your machine https://www.motosport.com/moose-dynojet-jet-kits

      Question asked by jack

      Question: I am looking to make my crf250x louder what would be a good choice thank you
      Question asked 1 year 5 months ago
      Question answered by TylerGearhead
      User's contributor status: Top 25
      Question answered 1 year 5 months ago
      Answer: Giving us a call at 1-888-676-8853 and we can better discuss the options!

      Question asked by DPMX7

      Question: Is this a quite exhaust? 07 crf150r
      Question asked 1 year 11 months ago
      I’m looking to make my crf150r quitter is this a good slip on to go with or are there quiter ones?
      Question answered by BillyEXT3407
      User's contributor status: Top 25
      Question answered 1 year 11 months ago
      Answer: The Q4 is a quiet exhaust with a Max Sound output 96 dB, most models below 93 dB. I am not aware of a quieter exhaust on the market today.

      Question asked by Bondy

      Question: Will the bolt straight on to my 510 TXE husqvarna 09
      Question asked Over 3 years ago

      Question asked by Devin

      Question: Fitment
      Question asked Over 3 years ago
      Will this pipe slip on my stock crf230f? And will I have to rejet it with the all stock?
      Question answered by MotoSportExpert
      User's contributor status: MotoSport Staff Expert
      Question answered Over 3 years ago
      Answer: Just be sure to correctly select the Year/Make/Model of your bike before ordering so we can be sure to send you the correct muffler for your bike. Normally when installing a slip-on only minor jetting changes are needed, if any at all. If your bike is currently jetted properly you will likely not have to make any changes after installing this slip-on. I would recommend installing the exhaust and riding the bike to see how it is running then tuning your carburetor from there if necessary. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.

      Question asked by Madison

      Question: Will this fit a 2007 Suzuki LT-Z250?
      Question asked Over 3 years ago
      Question answered by MotoSportExpert
      User's contributor status: Expert MotoSport Staff
      Question answered Over 3 years ago
      Answer: Yes. Just be sure to correctly select the Year/Make/Model of your ATV before ordering so we can be sure to send you the correct exhaust for your ATV. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
      1 - 10 of 21

      Fitment

      See all bikes that this part fits...

      # Part Numbers

      Product Variant Manufacturer Part #
      Aluminum 041287, 041249, 041332, 041365, 041255, 043236, 043208, 043211, 042156, 043207, 045124, 042116, 042118, 043203, 044285, 044286, 041330, 041331, 044437, 041338, 044232, 044195, 044199, 044291, 044210, 044301, 041333, 041337, 041339, 042320, 042321, 043206, 044288, 041585, 042363

      California Proposition 65

      WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling. For more information, go to www.P65Warnings.ca.gov.