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Cactus (Dover, AR)
Good Muffler
The Q4 is a great muffler and the sound tone is good. Very deep and throaty but I wish it was a little quieter.
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Cassie (Amarillo, TX)
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
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Dave (West Plains, MO)
Outstanding!
Works great, sounds great = no complaint!
Added a Megabomb and FMF programmer and there was a noticeable difference. Highly recommend!
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Rick (Tucson, AZ)
Quality
It's not too loud and has a better tone (stock sounded like a lawn mower). I made too many other changes at the same time to say anything about performance.
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Doug D. (oakridge or, OR)
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.
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Chad (Zimmerman, MN)
A must have for harescrambles/enduros
Exactly what was expected. Personally like the deeper throaty sound, great product.
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Ben (Yuba City, CA)
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. :)
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Kai P (Covelo, CA)
Q4 Slip-on 04 yamaha wr250
Awesome look when I pulled it out of the box and it mounted with No problem there but after looking at my side panel I could see that it was touching. So I trimmed it a little. The bike runs great, lots of power in the top end, but it backfires on the downshifts some times. I'm really happy with the sound and the product. Thanks
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Mark (Waterford, MI)
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.
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Steve (Leavenworth, WA)
2001 DRZ 400S
Easy fit. Installed in about 20 minutes. Sounds fantastic. Good low rumble while driving "normal," no worries of being too loud. Nice "bark" when you lay into the throttle. Very nice and noticeable power jump. Combined with a re-jet and some airbox treatment and the bike is much more responsive and powerful.
