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FMF Q4 Slip-On Exhaust

Q4 Slip-On Exhaust

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Was $319.99 - $649.99 $271.99 - $552.99 You save up to $97.00 (15%)

Rating 4.63 of 5 (46 Reviews)

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FMF Q4 Slip-On Exhaust

With riding areas threatened more every day, FMF takes seriously the expression ‘less sound equals more ground’ and with the Q4, FMF has designed a slip-on exhaust that leads in high performance quiet technology. Using the best materials, the Q4 uses intricate chambers and baffles to improve flow while still dampening sound. Roost more, ride more and offend less with the FMF Q4!
  • Developed over years of championship off-road racing
  • Max Sound output 96dB; most models below 93dB
  • Constructed from aircraft grade aluminum and high strength stainless steel
  • Use with stock or FMF header
  • Removable USFS spark arrestor included
  • Pounds lighter than stock in many cases
  • Twin stage core design for lower sound output and extended life of packing material

Click Here for Additional Exhaust Information
  • Item # 6903
  • SKU #
  • Mfr. Part #

FitmentView All

Honda Models

  • CRF150F : 2003–2009, 2012–2016
  • CRF150R : 2007–2010, 2012–2016
  • CRF150R Expert : 2007–2009, 2012–2016
  • CRF230F : 2003–2009, 2012–2016
  • CRF230L : 2008–2009
  • CRF230M : 2009
  • CRF250L : 2013–2015
  • CRF250R : 2004–2009
  • CRF250X : 2004–2009, 2012–2013, 2015
  • CRF450R : 2003, 2005–2008
  • CRF450X : 2005
  • TRX250X : 1987–1988, 1991
  • TRX300EX : 1993–2009
  • TRX300X : 2009
  • TRX400EX : 1999–2008
  • TRX400X : 2009, 2012–2014
  • TRX450ER : 2006–2009, 2012–2014
  • TRX450R : 2004–2009
  • TRX700XX : 2008–2009
  • XL600R : 1986
  • XR400R : 1996–2004
  • XR600R : 1986–1987, 1991–1998, 2000
  • XR650L : 1993–2009, 2012–2015
  • XR650R : 2000–2007

Husqvarna Models

  • SM630 : 2011
  • SMS630 : 2011
  • TC 450 : 2009
  • TE 630 : 2011
  • TE310 : 2013

Kawasaki Models

  • KFX400 : 2003–2006
  • KFX450R : 2008–2011
  • KLR650 : 1987–2015
  • KLX250S : 2006–2007, 2009–2010, 2012–2014
  • KLX250SF : 2009–2010
  • KLX400S : 2003
  • KLX400SR : 2003
  • KLX450R : 2008–2009
  • KX250F : 2004–2008
  • KX450F : 2006–2008, 2016–2017

KTM Models

  • 350 EXC-F : 2012–2015
  • 450 EXC : 2009–2011
  • 450 EXC-G Racing : 2004–2005
  • 450 EXC-R : 2008
  • 450 MXC : 2004–2005
  • 500 EXC : 2012–2015
  • 525 EXC-G Racing : 2004–2006
  • 525 MXC-G Racing : 2004–2005
  • 525 SX : 2005–2006
  • 525 SX Racing : 2004
  • 525 XC : 2006–2007
  • 525 XC-G Racing : 2007
  • 525 XC-W : 2007
  • 530 EXC : 2009–2011
  • 530 EXC-R : 2008
  • 690 Enduro : 2008
  • 690 Enduro R : 2009–2010, 2013
  • 690 SMC : 2008–2010
  • 950 Adventure : 2004–2007
  • 950 Adventure S : 2004–2006
  • 950 Super Enduro R : 2008
  • 950 Supermoto : 2005–2007
  • 990 Adventure : 2007–2011
  • 990 Adventure R : 2011
  • 990 Adventure S : 2007–2008
  • 990 Supermoto R : 2010–2011

Suzuki Models

  • DR200SE : 2009, 2013
  • DR650S : 2015
  • DR650SE : 1997–2009, 2011–2014
  • DR-Z400 : 2006–2007
  • DR-Z400S : 2000–2009, 2011–2015
  • DR-Z400SM : 2005–2009, 2013–2015
  • QuadRacer R450 : 2006–2009
  • QuadSport Z250 : 2004–2009
  • QuadSport Z400 : 2003–2009, 2012–2013
  • RM-Z250 : 2004–2006

Yamaha Models

  • Raptor 250 : 2008–2013
  • Raptor 250 SE : 2008
  • Raptor 250 SE Custom : 2008
  • Raptor 250R : 2011
  • Raptor 350 : 2005–2013
  • Raptor 660R : 2001–2005
  • TT-R250 : 1999–2006
  • WR250F : 2001–2009, 2011–2013
  • WR250R : 2008–2015
  • WR250X : 2008–2011
  • WR400F : 1998–2000
  • WR426F : 2001–2002
  • WR450F : 2003–2009, 2011
  • YFZ450 : 2004–2009, 2012–2013
  • YFZ450 Balance : 2006–2007
  • YFZ450 SE : 2007–2008
  • YFZ450R : 2009–2016
  • YFZ450R SE : 2009–2015
  • YFZ450X : 2008, 2010–2011
  • YFZ450X SE : 2011
  • YZ250F : 2001–2013
  • YZ400F : 1998–1999
  • YZ426F : 2000–2002
  • YZ450F : 2003–2009

Product Reviews 1 - 15 of 46

Overall Rating: 4.63 of 5

(46 Reviews)
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What Other Riders Are Saying...

Fit

Quality

Sound

Install

Performance

Just what I wanted

Great pipe !

Leon - January 11, 2016

(Victorville , CA)

Fit

Quality

Sound

Install

Performance

Great muffler (and pipe)

I just got the PowerBomb pipe and this Q4 muffler for my 2004 KLR-650. I'm very pleased with them both. They gave me the amazing combination of more power and less noise. The bike has a good sound too, but more of a rumble than a bark. It's also snappier - it never used to power slide - not enough snap to make it break away when you expect - now it does have that snap. The bike's much more fun to ride now. The header and the muffler bolted right up in a half hour or so. Everything fit with only a little encouragement. It's all very well made and the muffler mounting bracket looks very strong. I'd recommend this combination to anyone. I also got the heat shield and it looks good and finishes off the job nicely.

Edwin Ja - October 2, 2015

(Cohocton, NY)

Fit

Quality

Sound

Install

Performance

2008 Honda CRF230L with Q4

I purchased the Q4 looking to free up the air flow for a bit more power without a lot of extra noise. It is perfect for just that task. The bike has more power and the sound was nice with good tones. It fit perfect! Great product FMF!

Kurt - April 18, 2015

(Big Lake, MN)

Fit

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Sound

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Performance

FMF Q4

easy to install. the sound is much deeper than the stock pipe. better throttle response. I'm very pleased with the Q4

KEITH - January 27, 2015

(cocoa, FL)

Fit

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Install

Performance

2014 KTM 690 Supermoto

Replaced the OEM pipe and dropped 10LBs...Added a couple more HPs... The pipe is not obnoxiously load, but loud enough when you get on it, or need to let other drivers/riders, know you are there!

Jonathan - November 17, 2014

(Vista, CA)

Fit

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Sound

Install

Performance

Sounds great and looks good

Besides the hefty price tag that came with this exaust, the performance difference in my quad was amazing. After it shipped fairly quickly from the warehouse, I was able to install it easily with only a few problems with the supplied bracket.

Chris - August 21, 2014

(Oak Hills, CA)

Fit

Quality

Sound

Install

Performance

Good for the price

Needed to replace a stock muffler with one that advertised performance, sound, and spark arrestor. Performance is equal, spark arrestor is required, and sound is... better.

LArry - August 16, 2014

(jackson hole, WY)

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Klx250 q4

Excellent addition to bike. Sounds great, works great. Turns the bike into a proper moto. A little issue with fit due to some bent frame tabs. Didn't notice when installed originally, but once addressed all was good.

Brian - April 5, 2014

(Seattle, WA)

Fit

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Sound

Install

Performance

It will do.

Never had any issues with FMF products but this pipe was a bit pricey. Generally overall the construction is of top quality and adds a nice style to any bike. I found the exhaust sound to be quite weak and not much of an improvement from stock however I did find the throttle to be much more responsive.

Tad - October 21, 2013

(Niagara Falls, ON)

Fit

Quality

Sound

Install

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2008 650 XRL HONDA

I installed the Q4 exhaust along with the power bomb header and the jet kit back in 2010 and I love it. The only draw backs are the MPG's and the performance at high altitude. I live at 5,800 ft above sea level, and the higher you go, well the less power you have. Otherwise I would recommend it!

Jim E - July 24, 2013

(Montrose , CO)

Fit

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Sweet

The fit was okay and was easy to install. I like the lower end power gain without being obnoxiously loud. I matched it with the mega-bomb header at the same time. After taking it out a few times it was time to re-jet. Very happy with the results!

Geary - May 14, 2013

(Scottsdale, AZ)

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love it

love it just got it on the bike a few hour ago and love sounds good and looks good love it.

David - September 24, 2012

(Houston, TX)

Fit

Quality

Sound

Install

Performance

Great Product

This pipe was easy to install and did not seem to take away any power. It did also make it a lot quieter. Overall very satisfied.

Joe - September 17, 2012

(toledo, OH)

Fit

Quality

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Performance

Klr

Best mod i ever did...Period! day&night difference...perfect fit & finish, very satisfied!

charles - August 15, 2012

(edmundston, NB)

Fit

Quality

Sound

Install

Performance

It works like it should

Easy install, sounds great on my TTR, and it did add some low end punch.

rkoozno - August 15, 2012

(Granby, CO)
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