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FMF Q4 Slip-On Exhaust
FMF has always been a leader in high performance exhausts that won't wake up the neighborhood thanks to their inherent quiet technology. The Q4 muffler is no exception in the off road exhaust market. FMF has applied for several patents making it one of their most technically advanced products. The Q4 employs an intricate array of chambers, baffles and proprietary multistage packing material making it one of the best- performing quiet mufflers available. It's quiet technology in quite a svelte muffler package!
Developed over years of championship off-road racing
Max sound output 96dB
Significantly lighter than stock
Constructed using an aircraft grade aluminum sleeve and high strength stainless steel components
Fitment is guaranteed or your money back plus free return
Don't waste time installing a product that doesn't fit. We
worked hard ensuring that this product is an exact fit on the
vehicles listed below.
CRF150R 2007-2009, 2013-2014
CRF230F 2003-2009, 2012-2017
CRF250X 2004-2009, 2013
TRX400EX FourTrax 400EX 1999
TRX400EX Sportrax 400EX 2000-2008
TRX400X Sportrax 400X 2009-2010, 2012-2014
XR600R 1985-1987, 1991-1998, 2000
XR650L 1993-2009, 2012-2014
TC 250 2010-2011
TC 450 2009
TE 250 2010-2012
TE 310 2009, 2011
TE 510 2009
TE 630 2011-2012
450 EXC 2009-2011
450 EXC-R 2008
450 MXC-G Racing 2004-2005
450 SX 2006
450 XC-W 2007
525 EXC-G Racing 2004-2006
525 MXC-G Racing 2004-2005
525 SX 2006
525 SX Racing 2004-2005
525 XC 2007
525 XC-W 2007
530 EXC 2009-2011
530 EXC-R 2008
690 Enduro 2008
690 SMC 2008-2010
KL650B Tengai 1990-1991
DR200SE 2009, 2013
DR-Z400SM 2005-2009, 2012-2017
LT-Z250 QuadSport 250 2004-2009
LT-Z400 QuadSport 400 2003-2014
YFM250R Raptor 250 2008-2013
YFM350R Raptor 350 2005-2013
YFM660R Raptor 660R 2001-2005
YFZ450 2004-2009, 2012-2013
YZ250F 4-Stroke 2003-2013
out of 5
By Aaron F
on December 7, 2016
Great pipe! Sounds awesome and is USFS approved for trail rides.
Questions & Answers
My 2006 CFR 250R has dual exhaust and very loud. Will the FMF Q4 slip directly into the header and fit? I would pull the dual exhaust and the pipes that split coming out of header.
By: Steve K
Provided the header you're referring to is the OEM Honda header, then yes - the FMF Q4 will slip directly onto the header. It would replace the split coming from the OEM header and you'd go from a dual-muffler configuration to a single muffler exhaust.
Would this fit an ssr125 header?
If not what US Forestry Dept Approved fmf pipe would?
FMF Q4 mufflers are designed only to fit motorcycles and ATVs equipped with a stock or an FMF header. In that light, if the OEM muffler fits the SSR header that you have, then there's a good chance the FMF Q4 will also fit. Otherwise, if the SSR header came as a kit with its own muffler, or is designated only to fit SSR mufflers, then this, or any other muffler we sell, is not going to fit your needs - you'd have to source the correct muffler from SSR.
Will this fit a 2013 CRF150R?
Yes, we do have an FMF Q4 slip-on exhaust to fit the Honda CRF150R. Just choose your exact machine from our fit guide that's immediately to the right of the main image on our webpage and you'll be sent the right exhaust for your bike.
Will this fit Suzuki DRZ400E 2007? I only see "S" and "SM" models listed. AFAIK the header pipe on "E" is different size.
No, this muffler will not fit any DR-Z400E model. The reason is, as you've noted - the header diameters between the S/SM models and the E variant are different. Consequently, this muffler will not fit that bike. We do, however, have a 2007 DR-Z400E Leo Vince X3 Enduro Slip-On Exhaust that will fit that bike. It'll bolt straight onto the OEM header without issue!
I got a 2001 raptor 660r and I was wondering if the original exhaust pipe work with putting this on? I'm trying not to spend much money with different exhaust parts!
Yes, the stock Raptor 660 header will indeed fit this muffler. All of FMF's Q4 slip-on mufflers are designed to work with the stock exhaust pipe. Plus, should you decide later on that you want to get an FMF header, the muffler is compatible with all FMF headers that will fit your machine.
Does it come with all mounting hardware?
By: Jacob S.
In most cases, FMF exhausts require that you re-use some of the OEM exhaust mounting hardware in order to complete the installation of the muffler. These are parts such as the bolts used for hanging the muffler from the subframe and the clamp between the header and the muffler. Otherwise, any bespoke items, like the bracket that goes around the muffler, are included in the box. So long as you have the stock exhaust on your machine, you should have no problem fitting this, or any other FMF exhaust we sell.