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FMF Q Stealth Silencer - 2-Stroke
FMF Q Stealth Silencer - 2-Stroke

$170.99 $189.99
10% Off - Save $19.00

Item #FMF00EP

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8 Reviews
3.9 out of 5 stars
5 Star   4 4 Star   2 3 Star   0 2 Star   1 1 Star   1
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All Reviews
Verified Purchaser
San Diego. CA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 4/5 Style 5/5
Q-Stealth on '07 RM250

Great all around muffler, works perfect with Fatty pipe.
Allows me to ride everywhere, it takes a little off the top, but gives better power delivery through bottom and mid. Sounds Awesome, looks great and yes it will drip oil after a good ride due to exhaust cooling, but its perceftly normal.

Verified Purchaser
Idaho, USA
Durability 5/5 Ease of Installation 5/5 Performance 4/5 Power 4/5 Style 5/5
Fits and Performs

I needed a spark arrestor for my KX250, so I go this one. I am using it with the stock pipe. It works great, but you will need to lean out your carb some as it is not as free flowing as the stock muffler. Overall, pretty nice stuff.

San Diego, CA, USA
Durability 4/5 Ease of Installation 1/5 Performance 3/5 Power 3/5 Style 4/5
Does not fit YZ250

This does not fit a YZ250 (2010), and FMF did nothing to help. Terrible customer service on their end. I didn't have time to send it back to Motosport (was riding where I needed a spark arrestor later that week), but I'm sure they would have take in back. I know it was the spark arrestor that was the issue as I already have a FMF pipe and silencer (non-sparky) and they fit fine. So do the stock parts. Long story short, I had to cut the pipe portion off, remove 1/4", and TIG weld it back on to get it to fit correctly. FMF never even apologized for my issue, only gave me a hard time about voiding the warranty... I won't be buying FMF products again. Go with Pro Circuit if you're looking for a spark arrestor.

Top 1000 Contributor Verified Purchaser
Berkeley, CA, USA
Durability 5/5 Ease of Installation 1/5 Performance 3/5 Power 3/5 Style 5/5

I purchased this silencer for my 2002 YZ250. I loved FMF's dedication to 2 strokes and the idea behind making bikes as quiet as possible and that is exactly why I bought this silencer.

I am extremely disappointed with this silencer and FMF for that matter. For starters, it didn't even fit on my bike! I tried it on my friend's YZ250 also (in case my subframe or pipe was tweaked) and it was the same story. The silencer didn't even come close to lining up. So I was forced to start hacking on my brand new $$$ silencer which made me very unhappy. After taking off about 1/2" off the pipe and bending it upward, I finally got the silencer to bolt on.

I was anxious to start my bike up once I got the silencer on to see how quiet it was (this muffler is HUGE!). Noise is a major issue at the riding areas I frequent and I wanted to be a part of the solution by cutting the noise on my bike. Right away, I could tell that this muffler was no quieter than my worn out, oil soaked, PC silencer I just removed. Even after running it for awhile to break it in, there is really no noise reduction whatsoever from my old silencer. This was really disappointing because this muffler is about 3 times the size of the PC muffler on my bike before. Judging by size, this thing should be whisper quiet, but it is not even close.

The only thing this silencer has going for it is that it looks awesome on the bike. But looks alone would not push me to recommend this silencer or to purchase again if I had the chance.

For the money I paid for this, I don't want to have to hack away at a silencer to make it fit and then have it be just as loud as a smaller non-Q silencer. FMF needs to step up their game here.

New River, AZ, USA
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
The BEST Silencer ever MADE !

I bought this product for my 2004 kawaski kx 250 and it does wonders to my power in all areas. I will never get tired of this pipe! It is absolutely amazing. No questions about it.

Sandy, OR
Good Silencer

Good silencer, felt like it robbed a little from my top end, but gave it back on the bottom end. 2006 YZ 250, overall I am happy with the can and still has great sound!

northridge, ca


Best silencer

I got this silencer for my cr250 and it did not rob any power and was really quiet it kinda felt like it added a bit to my bottom and mid and great thing about it is the neighbors get off your back!!! :)

13 Questions
Answered:   13
Not Yet:   0
Q: Will this fit on a 2012 kawasaki 450f?
4 months ago
Top 25
4 months ago
A: We do not carry this muffler for that bike.
Q: Will this fit my 98 kx125 has fmf gold series fatty on it fmf shorty is on it now wayyyy to loud for by me
1 year 10 months ago
MotoSport Staff Expert
1 year 10 months ago
A: No sorry it will not fit your 1998 Kawasaki KX125.
Q: If this goes on a yz 250 in NH can it be street legal?
Over 5 years ago
MotoSport Staff
Over 5 years ago
A: That will really depend on your local laws. Typically the only thing regulating a street legal is the dB level or sound level of the exhaust. This exhaust will be the quietest you can buy for your yz250, so regardless of whether it is technically legal or not, it will be your best option.
Q: Will this silencer work with the fmf fatty pipe
Over 8 years ago
Expert MotoSport Staff
Over 8 years ago
A: Yes, this silencer will work with the FMF Fatty pipe.
Over 8 years ago
A: Yes, it will, that setup works very well.
Q: Will the q stealth work on 06 kx250 2 stroke stock pipe? if so will I need to change jetting?
Over 8 years ago
Over 8 years ago
A: Yes it will, i have the exact same setup. You will need to drop your pilot jet one or two sizes and i went down one size on the main and lowered the needle one clip. My jetting for 2500-5500 ft is 158 main, 42 pilot, stock needle in the 2 position from the top.
Expert MotoSport Staff
Over 8 years ago
A: Under the tab that says 'Fits these Rides' list your bike as fitting.

Check out FMF recommended jetting specs at
Q: What is the length of the canister?
Over 9 years ago
I've heard nothing but good things about this pipe, but I've never seen it. I have a 2004 Cr250r and was wondering if the end cap would stick out due to the overall length of the canister.
MotoSport Staff Expert
Over 9 years ago
A: Unfortunately it's difficult to get a measurement of the canister. This will be longer than stock, roughly a few inches.
Top 1000 Contributor
Q: Will this silencer fit a FMF SST Gold series pipe and will I need to re jet the bike.
Over 9 years ago
MotoSport Staff Expert
Over 9 years ago
A: Yes this would fit. Jetting will probably be necessary.
Q: ?
Over 9 years ago
is the spark arrestor removable
Expert MotoSport Staff
Over 9 years ago
A: No the spark arrestor is not removable.
FMF Q Stealth Silencer - 2-Stroke
Q: What happens if i put a 2002 honda cr 250 silencer on a1987 Honda cr 250r
Over 9 years ago
MotoSport Staff Expert
Over 9 years ago
A: It would happen without a lot of customizing.
Q: Will it pass
Over 9 years ago
Hello, I just got a warning with the police on how loud my 07 KX250F is and will this exhaust past the police sound meter? Please answer fast Thanks
MotoSport Staff
Over 9 years ago
A: Yes, the "Q" series is probably one of the most quiet exhausts on the market. It's well below the legal limit for DB's.
1 - 10 of 13
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See Fitments
# Part Numbers
Product Variant Manufacturer Part #
FMF Q Stealth Silencer - 2-Stroke 021056
FMF Q Stealth Silencer - 2-Stroke 022056
FMF Q Stealth Silencer - 2-Stroke 023063
FMF Q Stealth Silencer - 2-Stroke 025171
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WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling. For more information, go to