FMF Q4 Slip-On Exhaust

FMF Q4 Slip-On Exhaust

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$260.99 - $584.99 You save up to $64.96 (10%)

Rating 4.59 of 5 (40 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

**Closeouts are limited to stock on hand**

FitmentView All

Can-Am Models

  • DS 450 EFI: 2008 - 2011
  • DS 450 X: 2008
  • DS 450 X MX: 2011
  • DS 450 X XC: 2011

Honda Models

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

Husqvarna Models

  • SM630: 2011
  • SMS630: 2011
  • TC450: 2009
  • TE 630: 2011
  • TE310: 2010, 2013
  • TE510: 2009
  • TXC 250: 2009
  • TXC 450: 2010

Kawasaki Models

  • KFX400: 2003 - 2006
  • KFX450R: 2008 - 2011
  • KLR250: 1990 - 2004
  • KLR650: 1987 - 2014
  • KLX250S: 2006 - 2007, 2009 - 2010, 2012 - 2014
  • KLX250SF: 2009 - 2010
  • KLX400S: 2003
  • KLX450R: 2008 - 2009
  • KX250F: 2004 - 2008
  • KX450F: 2006 - 2011

KTM Models

  • 350 EXC-F: 2012 - 2014
  • 400 EXC: 2001
  • 400 MXC: 2001 - 2002
  • 400 SX: 2000 - 2002
  • 450 EXC: 2004, 2009 - 2011
  • 450 MXC: 2004 - 2005
  • 450XC: 2008 - 2010
  • 500 EXC: 2012 - 2013
  • 505SX: 2009
  • 520 EXC: 2000 - 2002
  • 520 MXC: 2001 - 2002
  • 520 SX: 2000 - 2002
  • 525 EXC: 2003 - 2006
  • 525 MXC: 2004 - 2005
  • 525 SX: 2003 - 2006
  • 525 XC: 2006 - 2007
  • 525 XC-G Racing: 2007
  • 525XC: 2008 - 2009
  • 530 EXC: 2009 - 2011
  • 530 EXC-R: 2008
  • 690 Enduro: 2008
  • 690 Enduro R: 2009 - 2010, 2013 - 2014
  • 690 SMC: 2008 - 2009
  • 950 Adventure: 2004 - 2007
  • 950 Super Enduro R: 2008
  • 950 Supermoto: 2005 - 2007
  • 990 Adventure: 2007 - 2011
  • 990 Adventure R: 2011

Polaris Models

  • Outlaw 450 MXR: 2009
  • Outlaw 525 IRS: 2007
  • Predator 500: 2003 - 2007

Suzuki Models

  • DR200SE: 2009, 2013
  • DR650SE: 1997 - 2009, 2011 - 2014
  • DR-Z400: 2006 - 2007
  • DR-Z400S: 2000 - 2009, 2011 - 2014
  • DR-Z400SM: 2005 - 2009, 2013 - 2014
  • QuadRacer R450: 2006 - 2009
  • QuadSport Z250: 2004 - 2009
  • QuadSport Z400: 2003 - 2009, 2012 - 2013
  • RMX450Z: 2010
  • RM-Z250: 2004 - 2009

Yamaha Models

  • Raptor 125: 2011 - 2013
  • Raptor 250: 2008 - 2013
  • Raptor 350: 2005 - 2013
  • Raptor 660R: 2001 - 2005
  • Raptor 700: 2014
  • Raptor 700R: 2006 - 2009, 2011, 2013 - 2014
  • TT-R250: 1999 - 2006
  • Warrior 350: 1987 - 2005
  • WR250F: 2001 - 2009, 2011 - 2013
  • WR250R: 2008 - 2011, 2013 - 2014
  • WR250X: 2008 - 2011
  • WR400F: 1998 - 2000
  • WR426F: 2001 - 2002
  • WR450F: 2003 - 2006
  • YFZ450: 2004 - 2009, 2013
  • YFZ450R: 2009 - 2014
  • YFZ450R SE: 2014
  • YFZ450X: 2010 - 2011
  • YZ250F: 2001 - 2009
  • YZ400F: 1998 - 1999
  • YZ426F: 2000 - 2002

Product Reviews Showing 15 of 40 Reviews

Overall Rating: 4.59 of 5

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

Fit

Finish

Durability

Features

Cost Benefit

Q4=WOW

After doing most other performance upgrades on my WR450, this was the real winner. Instant power increase without much more noise, then uncorked stock. I am very happy with the choice.

Paul - August 09, 2007

(burbank, IL)

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Finish

Durability

Features

Cost Benefit

FMF - Q4 Slip-On Exhaust

Q4 slip-on is quiet as advertised, noticable gain in power. This slip-on rocks.

Bill Milligan - June 18, 2008

(Shasta Lake, CA)

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Finish

Durability

Features

Cost Benefit

Amazing Pipe!!!!!

When I put this pipe on my new wr 250f in addition to the other performance upgrades that I have done with this bike this upgrade is the real winner it is quiet yet sounds great and is pretty fast looking and feeling and also looks really trick.

Aaron Oberlitner - July 15, 2008

(Kalispell, MT)

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Finish

Durability

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Cost Benefit

good deal

I recently installed this pipe, and it is louder than the original, but not obnoxious. With the jet kit to go along with it and installing a high flow air filter, the power is noticeably better and the delay in the throttle response is all but gone. The price was also a factor in purchasing. I feel it was a great deal for the money.

Mike Irwin - February 04, 2010

(Mays Landing, NJ)

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Performance

FMFQ4 Slip-On

Recently installed this on my 2008 CRF250X. It produces a throaty sound that is much better than the stock pipe. I also noticed nice performance gains out on trails as well as the track. Installation was a breeze for anyone with basic skills.

Todd M. - November 19, 2010

(Fresno, CA)

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FMF - Q4 Slip-On Exhaust

I just installed the FMF PowerBomb and Q4 on my Honda 700xx. It was a perfect fit and just took a few minutes. Sounds awesome. Not much louder than stock.

Dave B. - December 15, 2010

(St Louis, MO)

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Sound

Install

Performance

FMF Q4 Slip-On Exhaust

I love everything about this exhaust. Using it on a CRF250X. Easy to install. Perfect fit. Throw away your earplugs, because it is quiet - and that’s the reason I bought it. My last aftermarket exhaust was LOUD. I’ve put about four hours on it and so far it has performed as expected - it is an FMF! You are getting a quality exhaust that was made in the USA. And, you can't beat the price.

Dave - January 25, 2011

(Jolon, CA)

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FMF Q4 exhaust

Great pipe. A little heavier than Two Brothers, but waaaaay quieter and pleasant! Easy install, minor re-jetting. Nice sound at low speeds, louder with more throttle, but not obnoxious. My friend with the T/B exhaust is regretting buying his-too loud.

Dennis I. - January 31, 2011

(Paso Robles, CA)

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Performance

FMF Q4 Slip On Exhaust

Fit bike fine using power bomb header. Larger than factory 4.0 that I was using but much quieter so neighbors don't complain riding on private track. Possibly some loss of power but can't notice because I also switched tire that hooks up great on sandy track.

Mark - May 25, 2011

(Waterford, MI)

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Amazing

Bought it for my Honda CRF150rb...Sounds better. But not louder. Minor re-jetting is needed. Spent about 20 dollars on jetting parts. Happy with the purchase. My father told me it was a waste of my money but after I took it out to the track you can really tell a difference. Takes the very little throttle lag out of the already snappy 150rb. Lovin it! I would buy this for any bike I ride in the future faster than you can say FMF. :)

Ben - August 30, 2011

(Yuba City, CA)

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A must have for harescrambles/enduros

Exactly what was expected. Personally like the deeper throaty sound, great product.

Chad - September 16, 2011

(Zimmerman, MN)

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Performance

q4 on a dr 200

Everything was cool except why do you say this pipe is for a 2009 or 2010 when it fits perfect on my 2004 maybe you should check your application. Thank you.

Doug D. - September 27, 2011

(oakridge or, OR)

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Lovin It!

I installed this on my 08 YFZ 450, it was super easy and fast to install, love the sound now, performance boost too. Was worth every penny

Cassie - April 19, 2012

(Amarillo, TX)

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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)

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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)
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