Shopping For:
  1. Clear Selected Ride Clear Selected Ride
  2. Manage Saved Rides
  3. Change Your Selected Ride
2005 KTM 250SXF

FMF Q4 Spark Arrestor Slip-On Exhaust

FMF Q4 Spark Arrestor Slip-On Exhaust - Main
See More Views and Product Zoom
More Media
FMF Q4 Spark Arrestor Slip-On Exhaust - Main
+-
Retail: $359.99
$329.99
You Save: $30.00 (8%)
Free 3-day express shipping Shipping Info This item qualifies for free shipping

Please choose an available item.

In Stock
FITS: 2005 KTM 250SXF change
 
It appears you may have cookies turned off in your web browser, or are using a browser that does not support cookies. You must accept cookies to use our site. For questions call us at 1-888-676-8853.
Report an error
Chat with an expert | Email a question | Email this item to a friend

Product Description

As the pioneer of quiet performance mufflers, FMF raised the bar again in 2007 with the second generation of Q series mufflers, the Q4.

Built from the ground up, the Q4 is a completely new design, engineered for maximum performance while maintaining a sound level at or near 93 dB on most models. The Q4 is the market leader for low sound / high performance. Less sound equals more ground.

Q4 Details:

  • The Q4 incorporates Factory Forward Engineering to move the muffler closer - centralizing the mass for improved handling characteristics.
  • The new Hi-Flo formed end cap reduces weight and is less prone to damage.
  • The Q4 has an anodized aluminum canister and is lighter and quieter than the original Q model slip-on.
  • All Q4 exhausts utilize a maintenance-free USFS-approved turbine type spark arrestor so there is no screen to clean or burn out.
  • The Q4 employs free-flowing internal baffles and chambers, advanced sound-absorbing materials and a reduced weight.
  • Max Sound output 96 dB, most models below 93 dB.
  • Constructed from aircraft-grade aluminum and high-strength stainless steel.
  • Use with stock or FMF header.

You may also like

FMF Powercore 4 Slip-On Exhaust - 4-Stroke - 2005 KTM 250SXF FMF Q4 Spark Arrestor Slip-On Exhaust
FMF Powercore 4 Slip-On Exhaust - 4-Stroke
$279.99
JD Jet Kit - 2005 KTM 250SXF FMF Q4 Spark Arrestor Slip-On Exhaust
JD Jet Kit
$75.99
R&D Flex Jet Fuel Mixture Screw - 2005 KTM 250SXF FMF Q4 Spark Arrestor Slip-On Exhaust
R&D Flex Jet Fuel Mixture Screw
$32.95
  • Customer Reviews
  • Ask an Expert
  • Also Offered For
(13)
4.4 out of 5 stars
5 star   7
4 star   5
3 star 0
2 star   1
1 star 0
Write a Review
“ When installing the slip on, it didn't fit the head pipe at all. ”
LanceM88 Location: Charlotte, NC, USA
“ This slip-on is extremely easy to install,it took a total of about 10 minutes and that's with removin... ”
Jcarp Location: Freehold, ny
“ very quiet exhaust which is good if you ride in the woods, simple to put on!... ”
slaven13 Location: Cimarron,KS
1-10 of 13
Overall
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Charlotte, NC, USA
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.
Overall
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Montgomery County Texas
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!
Overall
Ease of Installation
Performance
Power
Verified Purchaser
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.
Overall
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: New Sharon, ME
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 ...
Overall
Location: 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.
Overall
Top 1000 Contributor
Location: Cimarron,KS
FMF
very quiet exhaust which is good if you ride in the woods, simple to put on!
Overall
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.
Overall
Location: 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.
Overall
Top 1000 Contributor
Location: 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.
Overall
Durability
Ease of Installation
Performance
Power
Style
Location: San Juan, Argentina
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.
1-10 of 13
Total Questions (2)
Questions with answers:
  2
Questions without answers:
0
Have a question?
1-2 of 2
Andyk Over 3 years ago Location: places,country
Jetting?
do you have to rejet for a slip on
MotoSport Staff Expert
Over 3 years ago Location: Portland, OR
A slipon exhaust typically won't effect the jetting. But if you find that you can not dial in the fuel screw you may need to. Jetting is a case by case situation.
2 months 13 days ago Location: Charlotte, NC, USA
I did. I bought the JD kit and did the airbox mod all at the same time. The CRF 250X comes from the factory really lean. It really woke it up!
Answer this Question
nodorftj Over 3 years ago
Can u get it any quieter? Do u have to jet it?
MotoSport Staff Expert
Over 3 years ago Location: Portland, OR
jetting will not quiet the exhaust. I don't believe this can become any quieter from out of the package. You can contact FMF to see if they have any ideas on how to make this more quiet.
Answer this Question
1-2 of 2

Dirt Bike

Honda

Honda CRF150F
Honda CRF150R
Honda CRF150R Big Wheel
Honda CRF230F
Honda CRF230L
Honda CRF250R
Honda CRF250X
Honda CRF450R
Honda CRF450X
Honda XR650L
Kawasaki

Kawasaki KLR650
Kawasaki KLX250S
Kawasaki KLX250SF
Kawasaki KLX400SR
Kawasaki KLX450R
Kawasaki KX250F
Kawasaki KX450F
KTM

KTM 250SXF
KTM 250XCF
KTM 250XCFW
KTM 400EXC
KTM 400XCW
KTM 450EXC
KTM 450MXC
KTM 450SX
KTM 450SXF
KTM 450XC
KTM 450XCF
KTM 505SXF
KTM 505XCF
KTM 525EXC
KTM 525MXC
KTM 525SX
KTM 525XC
KTM 530XCW
KTM 690 Enduro R
Suzuki

Suzuki DR200SE
Suzuki DR650SE
Suzuki DRZ400E
Suzuki DRZ400S

Suzuki RMX450Z
Suzuki RMZ250
Suzuki RMZ450
Yamaha

Yamaha WR250F
Yamaha WR250R (DUAL SPORT)
Yamaha WR250X (SUPERMOTO)

Yamaha WR400F
Yamaha WR426F
Yamaha WR450F
Yamaha YZ250F
Yamaha YZ400F
Yamaha YZ426F
Yamaha YZ450F

ATV

Arctic Cat

Arctic Cat DVX400
Can-Am

Can-Am DS450
Can-Am DS450X
Honda

Honda TRX250X
Honda TRX300EX
Honda TRX300X
Honda TRX400EX
Honda TRX450R (ELECTRIC START)
Honda TRX450R (KICK START)
Honda TRX700XX
Kawasaki

Kawasaki KFX400

Kawasaki KFX450R
KTM

KTM 450SX ATV
KTM 450XC ATV
KTM 505SX ATV
KTM 525XC ATV
Polaris

Polaris OUTLAW 450 MXR

Polaris OUTLAW 525 IRS
Suzuki

Suzuki LT-R450
Suzuki LTZ250
Suzuki LTZ400
Yamaha

Yamaha RAPTOR 250
Yamaha RAPTOR 350
Yamaha RAPTOR 660
Yamaha RAPTOR 700
Yamaha YFZ450
Yamaha YFZ450R
Yamaha YFZ450X

Featured FMF

FMF Factory 4.1 Spark Arrestor Insert - 2005 KTM 250SXF FMF Q4 Spark Arrestor Slip-On Exhaust
FMF Factory 4.1 Spark Arrestor Insert
$29.99
FMF Muffler Plug - 2005 KTM 250SXF FMF Q4 Spark Arrestor Slip-On Exhaust
FMF Muffler Plug
$4.99
FMF Q4 Spark Arrestor Slip-On Exhaust - 2005 KTM 250SXF FMF Q4 Spark Arrestor Slip-On Exhaust
FMF Q4 Spark Arrestor Slip-On Exhaust
$329.99
FMF Header Heat Shield Stainless - 2005 KTM 250SXF FMF Q4 Spark Arrestor Slip-On Exhaust
FMF Header Heat Shield Stainless
$34.99
* required entry

Forgot your password?