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FMF
Q4 Slip-On Exhaust
$260.99 - $431.99  Sale
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MSRP $289.99-479.95
Customer Rating:  

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Product Description
  • Fourth generation of the original Q - high performance quiet technology
  • Pounds lighter than stock
  • Developed over years of championship off-road racing
  • Max sound output 96dB; most models below 94db
  • Constructed of aircraft grade aluminum and high strength stainless steel
  • Twin stage core design for lower sound output and extended life of packing material
  • Comes standard with spark arrestor


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Customer Reviews
Average Rating -  Based on 9 Review(s)
Fit   4.3
Features   4.8

Finish   4.3
Cost Benefit   4.6

Durability   4.7
Overall   4.5
Latest Reviews
Fit   5.0
Finish   5.0
Durability   5.0
Features   5.0
Cost Benefit   5.0
Overall   5.0
Mike Irwin Mays Landing,  NJ 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.
Fit   2.0
Finish   4.0
Durability   4.0
Features   4.0
Cost Benefit   4.0
Overall   3.6
Charles Bell Tulsa,  OK Q4 on KLX250SF Had to modify the fit at the frame. Used steel brackets to drop the Q4 down below the signal light. After modifying the attachment the performance is excellent. I could tell the difference in the power. Sound is a little loud when you accelerate, but idles without too much noise. Overall, I'm quite satisfied.
Fit   5.0
Finish   5.0
Durability   4.0
Features   5.0
Cost Benefit   5.0
Overall   4.8
Nick grahamsville,  NY 06' rmz Great pipe. Made good power at a low db level. Would highly recommend for noise restriction areas.
Fit   5.0
Finish   4.0
Durability   5.0
Features   5.0
Cost Benefit   3.0
Overall   4.4
JW Courtney Baton Rouge,  LA Q4 slip on The best thing about the Q4 is the sound. Not too loud but a nice low growl. It really opens up the exhaust over stock. Coupled with the FMF header and the FMF power programmer it's a good improvement. Though a little pricey for the amount of HP gain. Not sure how well it would work if you didn't also get the FMF programmer to remap the fuel.
Fit   3.0
Finish   3.0
Durability   5.0
Features   5.0
Cost Benefit   4.0
Overall   4.0
Steven Graham Eureka,  CA Q4 slip on exhaust The pipe did the job of quieting down the bike.
Fit   4.0
Finish   3.0
Durability   4.0
Features   4.0
Cost Benefit   5.0
Overall   4.0
Michael R. Snover Merrillville,  IN FMF - Q4 Slip-On Exhaust On 2008 Yamaha WR250X Super easy to install, instructions were straight forward. Sound is somewhat louder than stock. (I LIKE IT!) Seat of the pants power is better. (Now can lift front wheel in 1st and 2nd with no problem)Spark plug is light brown, no need to remap the FI. Only problem I see is that there is a leak where the exhaust pipe and the Muffle shell met. Has some gas and condensate escaping.
Fit   5.0
Finish   5.0
Durability   5.0
Features   5.0
Cost Benefit   5.0
Overall   5.0
Aaron Oberlitner Kalispell,  MT 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.
Fit   5.0
Finish   5.0
Durability   5.0
Features   5.0
Cost Benefit   5.0
Overall   5.0
Bill Milligan Shasta Lake,  CA FMF - Q4 Slip-On Exhaust Q4 slip-on is quiet as advertised, noticable gain in power. This slip-on rocks.
Fit   5.0
Finish   5.0
Durability   5.0
Features   5.0
Cost Benefit   5.0
Overall   5.0
Paul burbank,  IL 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.
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