FMF Q4 Spark Arrestor Slip-On Exhaust

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

$287.99 - $341.99
10% Off - Save up to $38.00

Description See Also: 15 Reviews 13 Questions Fitment
Item #FMF001G

Read More
15 Reviews
4.7 out of 5 stars
5 Star   11 4 Star   5 3 Star   0 2 Star   1 1 Star   1
Write a Review

Write your review and you'll automatically be entered in our monthly drawing. Include an image or video to DOUBLE your chances to win!

Write Your Review Write a review to win $500
All Reviews
Jakhans
Denmark
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
Q4 on a WR250F

It fit like a glove, no problem at all, from pulling the Q4 out of the box to finish installation, it took max 10 min.
Great sound, looks and super performance.
I have the Powerbomb header, it slipped right on.

FMF Q4 Spark Arrestor Slip-On Exhaust
thekingofcrash Top 500 Contributor Verified Purchaser MotoSport Staff Expert
Boring, OR, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Q4 Slip on 09 CRF450R

Looks good easy to install, needed a quiet set up for meeting AMA sound requirements and to keep the neighbors happy, as well as a USFS Spark arrestor for the local trails. Defiantly a lot quieter than stock, no noticeable power loss, if anything a power slight gain over the stock can, and as always with FMF you can expect quality! Price is good too, if you need to get the sound down this is your best option hands down.

LanceM88 Verified Purchaser
Charlotte, NC, USA
Durability 5/5 Ease of Installation 3/5 Performance 5/5 Power 5/5 Style 5/5
Wasn't a perfect fit.

When installing the slip on, it didn't fit the head pipe at all. It comes with a bushing that fit the ID of the slip on great, but was way too loose on the OD of the head pipe. (stock head pipe). It was a good .065 too big. I have a lathe, so I turned out a new bushing instead of laying on the silicone Other than that, I'm happy with the performance and it sounds great.

Rainman52 Verified Purchaser
Montgomery County Texas
Durability 5/5 Ease of Installation 5/5 Performance 4/5 Power 4/5 Style 5/5
Q4 dialed in

I installed the Q4 after trying a Two Brothers pipe for a while. The TBs VALLE unit was a monster torquey pipe, but was insane loud. The Q4 is not quite as tourquey, but was a heak of a lot easier to tune. No pop, surge, or mad neighbors.

The Q4 is the way to go on the DR650!

FMF Q4 Spark Arrestor Slip-On Exhaust
AllezMullet Verified Purchaser
Ease of Installation 5/5 Performance 5/5 Power 5/5
Rumble !

Easily installed,, and it seems to lower the DB output by lowering the frequency of the exhaust noise. Result is an awesome low rumble / growl sound.

WRTrailRider Verified Purchaser
New Sharon, ME
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Great Pipe

I have had this Pipe for about 6 months now and have no complaints. Made the bike run much smoother at lower RPM's with plenty of power on top as well. Great tone and not obnoxiously loud. Meets my State requirements for trail riding. Easy to install ...

FMF Q4 Spark Arrestor Slip-On Exhaust
Jcarp
Freehold, ny
Love this thing!

This slip-on is extremely easy to install,it took a total of about 10 minutes and that's with removing the stock muffler. Can't wait to add the header.

turborex696
NC
Much better than stock

I love my FMF Q4. Its so much lighter and more quet than the stocker on my 09 kx450f. If i had to do it again I would buy this they day I bought the bike. My only complaint is that the stickers peel off very easily.

slaven13 Top 1000 Contributor
Cimarron,KS
FMF

very quiet exhaust which is good if you ride in the woods, simple to put on!

crispy
Nice exhaust, could be a little better

Great looks, sounds great while maintaining a very, very responsible decibel level. The main area of benefit is the more compact design. My stock exhaust looked like a scud missile coming off the back of my bike. The 2 things I didn't like were, 1. It doesn't come in Titanium anymore, 2. Having to use RTV sealant at the header is just a pain, the sealant stinks to high h*** the first couple rides as it initially heats up. Other than that, no complaints with funtionality.

AzGreen
Phoenix, Az.
Great pipe

I replaced the stock muffler on my '07 KLX250 with this pipe. After proper jetting it really woke up the bike. Nice bark in the the sound and much more bite the stock setup had. It fit up perfectly. Did have to tweak the turn signal up a little to keep from cooking it but plan changing the out for LED's in the future. I added the Power Bomb two weeks later to get more pull in the lower rev range and it definitely helped. Should have pulled the trigger and bought both at the same time. The 'Bomb does quiet the sound a little and makes it more throaty.

n8acco Top 1000 Contributor
Marin County, CA.
Rare Defect

I have run FMF exhaust since I started ridding and every bike I have owned has wound up with a front to back system. My only 2 complaints about this tip are 1. My spark arrestor blew out on the trail after only 2 months of use. The head of the bolt that held the screen in sheered off clean. Due to the fact that I am not a machine shop, I didn't even attempt to extract it. Instead I tried turning to FMF which brings up complaint # 2. The tech that I talked to on the phone was no help. He somehow felt that I had taken the screen in and out and must have weakened the bolt and snapped it myself? He told me that there was nothing they could do to help in repair process not even a free replacement screen for me to frankinstall myself. He told me that I should look to get another tip. No problem they grow on trees right.

Anyway, 3 rivets a new spark arrestor and a year and a half later it's all been good. I would have given this a one star if this review was based on the help I received from FMF.

enroscado
San Juan, Argentina
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 5/5
Great exhaust!

Great performance, great looks and finish, a little lighter than the stocker, not so much noise. Only con: You can't use a clamp, and need to use high temp silicone.

DM794 Top 100 Contributor
Titusville, FL
Durability 5/5 Ease of Installation 5/5 Performance 4/5 Power 3/5 Style 5/5
Quiet!

Great exhaust! I didn't notice a huge power gain but it will definitely help you pass tech inspection! Super quiet and is under 96db's on my 2008 yz450f.

bradocius Top 100 Contributor
Reno NV
Durability 2/5 Ease of Installation 4/5 Performance 4/5 Power 4/5 Style 3/5
OK

i had an older model of this exhaust and it did give it a good power boost but a couple of months after i purchased it the muffler's weld broke off from the mid-pipe

13 Questions
Answered:   13
Not Yet:   0
Devin
Location: Rushville, PA 18828, USA
Q: Fitment?
3 months 6 days ago
Will this pipe slip on my stock crf230f? And will I have to rejet it with the all stock?
MotoSportExpert
MotoSport Staff Expert
3 months 5 days ago
A: 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.
Madison
Q: Will this fit a 2007 Suzuki LT-Z250?
3 months 16 days ago
MotoSportExpert
MotoSport Staff Expert
3 months 16 days ago
A: 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.
Jack
Location: Glastonbury
Q: Will this fit on a Honda 2000 300 ex?
Over 10 months ago
MotoSportExpert
Expert MotoSport Staff
Over 9 months ago
A: Yes the FMF Q4 Spark Arrestor Slip-On Exhaust fits your 2000 Honda TRX300EX. 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.
Nick
Q: Would this fit a powerbomb header?
Over 11 months ago
MotoSportExpert
MotoSport Staff Expert
Over 11 months ago
A: Yes the FMF Q4 Spark Arrestor Slip-On Exhaust will work with either the Powerbomb or Megabomb header.
Jonathan
Q: Will this fit my 2006 Honda CRF150F with the stock header? Also,is this in spec with sound restrictions on Michigan ORV Trails?
1 year ago
MotoSportExpert
Expert MotoSport Staff
1 year ago
A: Yes. All of FMFs testing is done around one of the FMF pipes, but FMF does build them so that they will fit up to and work with a stock OEM pipe. Expect similar gains with FMF silencers on a stock pipe as you would when using it with an FMF pipe.
The FMF Q4 Spark Arrestor Slip-On Exhaust has a Max Sound output 96dB; most models below 93dB.
Jackson
Location: Kentucky, USA
Q: If I order the Q4 for my 2008 honda crf150r, can I put a Db dawg silencer insert in it and if so what size Db dawg should I get?
1 year 6 months ago
MotoSportExpert
Top 1 Contributor
1 year 6 months ago
A: The DB Dawg is a universal product. You will have to measure the ID of the outlet of the muffler to get the correct sized DB dawg product.
Hunter
Location: Arkansas
Q: Will this fit my crf150f 2014?
1 year 8 months ago
Note I will leave my scock header on. So will this fit with the stock header
MotoSportExpert
Expert MotoSport Staff
1 year 8 months ago
A: Yes this FMF Q4 Spark Arrestor Slip-On Exhaust will work with the stock header on your 2014 Honda CRF150F. 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 exhaust for your bike. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Tommybattelle
Location: Los Angeles
Q: Could i buy a new mid pipe to fit my rmz?
1 year 10 months ago
I bought this pipe off of someone on Craigslist. It's for a 2005 rmz 250, but the mid pipe is different and doesn't fit my bike. Am I able to buy a mid pipe to fit my bike?!
MotoSportExpert
Top 1 Contributor
1 year 10 months ago
A: No. FMF does not sell a mid pipe for the FMF Q4 series exhaust.
Jevers
Location: Ontario
Q: Re:spark arrestor...?
2 years 3 months ago
It says in the description that the q4 comes with turbine spark arrestor but yet the q4 for my DRZ400sm has a chinsey screen type arrestor in the end cap!?! Why?
MotoSportExpert
Top 1 Contributor
1 year 11 months ago
A: FMF Q4 Spark Arrestor Slip-On Exhaust will vary for each model of machine. The Turbine core is a different type of silencer core that FMF uses in a different model of exhaust predominately. Most all models of the Q4 come with a screen type of insert for the spark arrestor.
CLAW
Q: Will this fit my 2007 KTM 450SXF?
2 years 8 months ago
From the looks of the picture, I wouldn't think this fits my bike. The same goes for some of the other silencers pictured for my bike. They look very different than my current exhaust system. My current stock silencer hangs from 2 top-mounted brackets bolted to the bike beneath the sub-frame. I only see 1 hanger/bracket on the silencer pictured in the photo. Also, my stock header and mid pipe are a single unit, and this unit is bolted to the frame using an integrated nut. The stock silencer then slips onto this unit just below the sub frame and is connected by a spring, but the picture here seems to show an extension coming out of the silencer with an extension and integrated nut built into the extension. This will not work with my stock header/mid pipe combo. Last but not least, I need a product with a spark arrestor for woods riding, no matter which silencer I choose. Thanks in advance.
MotoSportRyanT
MotoSport Staff Expert
2 years 8 months ago Location: Portland, OR, USA
A: The images shown may not be the specific muffler for your bike (the website shows the same generic picture for any bike). As long as you correctly profile your 2007 KTM 450 SXF as the ride you are shopping for, the exhaust we send out will specifically be for that bike. This would be a great Slip-On to go with as it has a spark-arrestor and is also quieter than any other slip-on exhausts avaiable, Another to look at would be the FMF Powercore 4 which comes with a removable spark arrestor screen. I would also recommend taking a look at the Yoshimura RS-3 Comp Series Full System Exhaust, it is a full system, but is reasonably priced and does also come with a spark arrestor insert.
1-10 of 13
Fitment
See all bikes that this part fits...
See Fitments